Year	Grams per day
1992	53.23
1993	58.23
1994	78.47
1995	67.71
1996	92.49
1997	103.38
1998	101.05
1999	138.56
2000	150.1
2001	150.86
2002	118
2003	120.15
2004	143.98
2005	144.23
2006	130.91
2007	130.58
2008	119.3
2009	127.45
2010	126.46
2011	119.84
2012	89.51
2013	86.53