Year	Grams per day
1992	77.66
1993	80.91
1994	69.69
1995	75.79
1996	70.09
1997	93.8
1998	105.03
1999	97.62
2000	101.41
2001	120.38
2002	110.3
2003	107.36
2004	105.8
2005	115.37
2006	126.27
2007	130.47
2008	137
2009	130.84
2010	117.95
2011	124.97
2012	127.49
2013	130.01