Year	Grams per day
1992	92.91
1993	96.91
1994	96.18
1995	99.35
1996	103.27
1997	103.66
1998	107.87
1999	111.86
2000	112.27
2001	114.28
2002	120.34
2003	121.77
2004	127
2005	132.51
2006	138.14
2007	139.67
2008	139.06
2009	131.99
2010	129.29
2011	134.04
2012	133.92
2013	134.29