Natural gas sample | Methane (CH4)% = a | Ethane (C2H6)% = b | Propane (C3H8)% = c | Butane (C4H10)% = d | Other incombustibles = e |
A (2008) | 93.90 | 3.60 | 1.30 | 1.20 | 0.00 |
B (2009) | 91.35 | 4.00 | 2.8 | 1.22 | 0.63 |
C (2010) | 90.44 | 4.50 | 3.40 | 0.70 | 0.96 |
D (2011) | 87.50 | 5.75 | 3.90 | 1.63 | 1.22 |
E (2012) | 85.60 | 7.40 | 4.50 | 1.30 | 1.20 |
F (2013) | 83.00 | 7.9 | 5.00 | 2.20 | 1.90 |
G (2014) | 79.70 | 8.50 | 4.80 | 2.50 | 4.50 |
H (2015) | 78.73 | 11.19 | 4.25 | 2.85 | 2.13 |
I (2016) | 78.73 | 11.77 | 5.97 | 1.40 | 2.13 |