Year	Grams per day
1992	122.94
1993	112.75
1994	127.69
1995	130.98
1996	126.05
1997	113.3
1998	113.65
1999	104.01
2000	124.73
2001	157.59
2002	169.85
2003	186.15
2004	177.76
2005	168.01
2006	170.68
2007	132.28
2008	139.99
2009	138.2
2010	147.59
2011	143.02
2012	128.67
2013	118.48