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. 2017 Apr 17;8(2):117–147. doi: 10.1080/21645698.2017.1309490
  Annual reduction based on 1996 average of 39.1 (liters/ha) Crop area (million ha) Total fuel saving (million liters) Carbon dioxide (million kg)
1996 0.0 5.9 0.0 0.00
1997 2.3 6.4 14.7 39.16
1998 3.1 7.0 21.5 57.39
1999 2.7 8.2 21.9 58.54
2000 3.0 10.6 31.6 84.45
2001 5.8 11.5 67.2 179.41
2002 8.3 13.0 107.3 286.57
2003 9.8 13.5 132.2 352.90
2004 11.7 14.3 167.4 447.02
2005 10.7 15.2 163.0 435.19
2006 11.0 16.2 177.4 473.74
2007 12.3 16.6 204.2 545.15
2008 13.7 16.8 230.4 615.13
2009 13.2 18.6 245.9 656.53
2010 13.7 18.2 249.8 667.06
2011 14.3 18.6 265.5 709.00
2012 14.3 19.4 276.3 737.58
2013 14.3 19.8 282.0 752.83
2014 14.3 19.8 282.4 753.97
2015 14.3 19.4 277.0 739.49
Total     3,217.7 8,591.1

Note: based on 21.89 liters/ha for NT and 49.01 liters/ha for CT