The following are theoretical NGX Canadian Natural Gas IndexTM values based on historical NGX settlement values, setting Day 1 of the Index as December 19, 2007, having a value of 1000 and a roll adjustment of 1, and calculating the Index value retroactively back to Jan 1, 2005.
NGX Canadian Natural Gas Index Theoretical History (prior to Day 1)          
Date Index Change Prompt Price Deferred Price
Jan 01, 2005 3633.51 0.00 5.9850 5.9850
Jan 02, 2005 3633.51 0.00 5.9850 5.9850
Jan 03, 2005 3493.87 -139.63 5.7550 5.7850
Jan 04, 2005 3659.31 165.44 6.0275 6.0450
Jan 05, 2005 3607.70 -51.60 5.9425 5.9700
Jan 06, 2005 3720.02 112.31 6.1275 6.1825
Jan 07, 2005 3671.45 -48.57 6.0475 6.1000
Jan 08, 2005 3671.45 0.00 6.0475 6.1000
Jan 09, 2005 3671.45 0.00 6.0475 6.1000
Jan 10, 2005 3771.62 100.17 6.2125 6.2850
Jan 11, 2005 3674.49 -97.14 6.0525 6.1125
Jan 12, 2005 3534.85 -139.63 5.8225 5.8575
Jan 13, 2005 3929.47 394.62 6.4725 6.5800
Jan 14, 2005 3874.83 -54.64 6.3825 6.4200
Jan 15, 2005 3874.83 0.00 6.3825 6.4200
Jan 16, 2005 3874.83 0.00 6.3825 6.4200
Jan 17, 2005 3874.83 0.00 6.3825 6.4200
Jan 18, 2005 3732.16 -142.67 6.1475 6.1825
Jan 19, 2005 3765.55 33.39 6.2025 6.2550
Jan 20, 2005 3896.08 130.53 6.4175 6.4800
Jan 21, 2005 3801.98 -94.10 6.2625 6.2875
Jan 22, 2005 3801.98 0.00 6.2625 6.2875
Jan 23, 2005 3801.98 0.00 6.2625 6.2875
Jan 24, 2005 3961.51 159.53 6.5200 6.5725
Jan 25, 2005 3874.58 -86.93 6.3675 6.4425
Jan 26, 2005 3895.74 21.16 6.4100 6.4725
Jan 27, 2005 3819.16 -76.58 6.2950 6.3425
Jan 28, 2005 3808.63 -10.54 6.2700 6.3250
Jan 29, 2005 3808.63 0.00 6.2700 6.3250
Jan 30, 2005 3808.63 0.00 6.2700 6.3250
Jan 31, 2005 3859.81 51.18 6.3425 6.4100
Feb 01, 2005 3846.26 -13.55 6.3875 6.4225
Feb 02, 2005 3918.52 72.26 6.5075 6.4800
Feb 03, 2005 3751.42 -167.10 6.2300 6.2300
Feb 04, 2005 3739.38 -12.04 6.2100 6.2000
Feb 05, 2005 3739.38 0.00 6.2100 6.2000
Feb 06, 2005 3739.38 0.00 6.2100 6.2000
Feb 07, 2005 3698.73 -40.65 6.1425 6.1125
Feb 08, 2005 3801.10 102.37 6.3125 6.3025
Feb 09, 2005 3799.59 -1.51 6.3100 6.3025
Feb 10, 2005 3793.57 -6.02 6.3000 6.3000
Feb 11, 2005 3713.79 -79.79 6.1675 6.2100
Feb 12, 2005 3713.79 0.00 6.1675 6.2100
Feb 13, 2005 3713.79 0.00 6.1675 6.2100
Feb 14, 2005 3686.69 -27.10 6.1225 6.1875
Feb 15, 2005 3745.40 58.71 6.2200 6.2375
Feb 16, 2005 3724.32 -21.08 6.1850 6.2275
Feb 17, 2005 3582.82 -141.51 5.9500 6.0000
Feb 18, 2005 3595.17 12.35 5.9775 5.9925
Feb 19, 2005 3595.17 0.00 5.9775 5.9925
Feb 20, 2005 3595.17 0.00 5.9775 5.9925
Feb 21, 2005 3595.17 0.00 5.9775 5.9925
Feb 22, 2005 3693.66 98.49 6.1175 6.1925
Feb 23, 2005 3913.95 220.29 6.4925 6.5550
Feb 24, 2005 3908.32 -5.63 6.5350 6.5325
Feb 25, 2005 4101.27 192.95 6.8050 6.8550
Feb 26, 2005 4101.27 0.00 6.8050 6.8550
Feb 27, 2005 4101.27 0.00 6.8000 6.8550
Feb 28, 2005 4077.34 -23.93 6.7500 6.8150
Mar 01, 2005 4083.32 5.98 6.8250 6.8725
Mar 02, 2005 4125.20 41.88 6.8950 6.9425
Mar 03, 2005 4099.77 -25.43 6.8525 6.9100
Mar 04, 2005 4122.21 22.44 6.8900 6.9625
Mar 05, 2005 4122.21 0.00 6.8900 6.9625
Mar 06, 2005 4122.21 0.00 6.8900 6.9625
Mar 07, 2005 4095.28 -26.92 6.8450 6.9350
Mar 08, 2005 4150.63 55.34 6.9375 7.0050
Mar 09, 2005 4120.71 -29.91 6.8875 6.9575
Mar 10, 2005 4036.95 -83.76 6.7475 6.8275
Mar 11, 2005 4075.84 38.89 6.8125 6.8775
Mar 12, 2005 4075.84 0.00 6.8125 6.8775
Mar 13, 2005 4068.36 -7.48 6.8000 6.8775
Mar 14, 2005 4339.09 270.73 7.2525 7.2675
Mar 15, 2005 4331.61 -7.48 7.2400 7.3000
Mar 16, 2005 4377.98 46.37 7.3175 7.3925
Mar 17, 2005 4301.69 -76.28 7.1900 7.2875
Mar 18, 2005 4398.92 97.22 7.3525 7.4025
Mar 19, 2005 4398.92 0.00 7.3525 7.4025
Mar 20, 2005 4398.92 0.00 7.3525 7.4025
Mar 21, 2005 4454.26 55.34 7.4450 7.5350
Mar 22, 2005 4394.43 -59.83 7.3450 7.4325
Mar 23, 2005 4383.12 -11.30 7.3325 7.3875
Mar 24, 2005 4310.39 -72.74 7.2025 7.2775
Mar 25, 2005 4310.39 0.00 7.2025 7.2775
Mar 26, 2005 4310.39 0.00 7.2025 7.2775
Mar 27, 2005 4310.39 0.00 7.2025 7.2775
Mar 28, 2005 4251.80 -58.59 7.1025 7.1800
Mar 29, 2005 4445.82 194.02 7.3975 7.5150
Mar 30, 2005 4499.07 53.24 7.4825 7.6050
Mar 31, 2005 4565.62 66.55 7.6350 7.7175
Apr 01, 2005 4657.32 91.70 7.8725 7.9625
Apr 02, 2005 4657.32 0.00 7.8725 7.9625
Apr 03, 2005 4657.32 0.00 7.8725 7.9625
Apr 04, 2005 4553.79 -103.53 7.6975 7.8125
Apr 05, 2005 4536.04 -17.75 7.6675 7.7425
Apr 06, 2005 4530.13 -5.92 7.6575 7.7425
Apr 07, 2005 4402.93 -127.19 7.4425 7.5575
Apr 08, 2005 4397.02 -5.92 7.4325 7.5250
Apr 09, 2005 4397.02 0.00 7.4325 7.5250
Apr 10, 2005 4397.02 0.00 7.4325 7.5250
Apr 11, 2005 4459.13 62.12 7.5375 7.6150
Apr 12, 2005 4321.59 -137.55 7.3050 7.3825
Apr 13, 2005 4292.01 -29.58 7.2550 7.3050
Apr 14, 2005 4349.69 57.68 7.3525 7.4075
Apr 15, 2005 4297.92 -51.76 7.2650 7.3675
Apr 16, 2005 4297.92 0.00 7.2650 7.3675
Apr 17, 2005 4297.92 0.00 7.2650 7.3675
Apr 18, 2005 4265.39 -32.54 7.2100 7.2850
Apr 19, 2005 4315.67 50.29 7.2950 7.3550
Apr 20, 2005 4278.70 -36.97 7.2325 7.2950
Apr 21, 2005 4331.94 53.24 7.3225 7.3500
Apr 22, 2005 4384.85 52.90 7.4100 7.4475
Apr 23, 2005 4384.85 0.00 7.4100 7.4475
Apr 24, 2005 4384.85 0.00 7.4100 7.4475
Apr 25, 2005 4348.23 -36.61 7.3500 7.3825
Apr 26, 2005 4396.01 47.78 7.4175 7.4725
Apr 27, 2005 4120.59 -275.42 6.9700 7.0000
Apr 28, 2005 4138.25 17.66 7.0000 7.0300
Apr 29, 2005 4008.75 -129.50 6.7400 6.8100
Apr 30, 2005 4008.75 0.00 6.8100 6.8100
May 01, 2005 4008.75 0.00 6.8100 6.8100
May 02, 2005 4085.27 76.53 6.9400 7.0150
May 03, 2005 3983.73 -101.54 6.7675 6.8400
May 04, 2005 4086.74 103.01 6.9425 6.9600
May 05, 2005 4123.54 36.79 7.0050 7.0550
May 06, 2005 4033.77 -89.77 6.8525 6.9425
May 07, 2005 4033.77 0.00 6.8525 6.9425
May 08, 2005 4033.77 0.00 6.8525 6.9425
May 09, 2005 4079.39 45.62 6.9300 6.9925
May 10, 2005 4045.54 -33.85 6.8725 6.9575
May 11, 2005 4055.84 10.30 6.8900 6.9800
May 12, 2005 3971.96 -83.88 6.7475 6.8150
May 13, 2005 4020.52 48.56 6.8300 6.9125
May 14, 2005 4020.52 0.00 6.8300 6.9125
May 15, 2005 4008.75 -11.77 6.8100 6.9125
May 16, 2005 3983.73 -25.02 6.7675 6.8500
May 17, 2005 3989.62 5.89 6.7775 6.8325
May 18, 2005 3910.15 -79.47 6.6425 6.6875
May 19, 2005 3876.30 -33.85 6.5850 6.6475
May 20, 2005 3873.06 -3.24 6.5775 6.6500
May 21, 2005 3873.06 0.00 6.5775 6.6500
May 22, 2005 3873.06 0.00 6.5775 6.6500
May 23, 2005 3886.00 12.94 6.6125 6.6525
May 24, 2005 3844.12 -41.89 6.5500 6.5675
May 25, 2005 3826.53 -17.59 6.5125 6.5425
May 26, 2005 3767.94 -58.58 6.3625 6.4550
May 27, 2005 3791.29 23.35 6.3900 6.4950
May 28, 2005 3791.29 0.00 6.3900 6.4950
May 29, 2005 3791.29 0.00 6.3900 6.4950
May 30, 2005 3791.29 0.00 6.3900 6.4950
May 31, 2005 3800.05 8.76 6.4100 6.5100
Jun 01, 2005 3982.46 182.41 6.8225 6.9675
Jun 02, 2005 40