Year	Grams per day
1992	143.83
1993	124.02
1994	106.26
1995	102.07
1996	104.74
1997	99.29
1998	101.59
1999	106.5
2000	120.05
2001	129.85
2002	122.32
2003	123.57
2004	131.17
2005	135.4
2006	141.99
2007	143.66
2008	143.65
2009	131.5
2010	129.49
2011	132.9
2012	131.25
2013	126.32