Year	Grams per day
1992	73.21
1993	43.08
1994	47.26
1995	41.18
1996	43.92
1997	49.91
1998	78.59
1999	74.24
2000	37.13
2001	34.12
2002	38.91
2003	39.85
2004	56.63
2005	62.92
2006	70.49
2007	68.04
2008	69.99
2009	68.9
2010	69.81
2011	73.37
2012	71.85
2013	86.3