Year	Grams per day
1961	134.65
1962	138.98
1963	136.25
1964	121.21
1965	135.54
1966	139.74
1967	136.52
1968	126.31
1969	135.44
1970	136.82
1971	132.46
1972	132.45
1973	132.69
1974	140.8
1975	123.06
1976	135.36
1977	127.54
1978	139.72
1979	137.91
1980	126.37
1981	125.08
1982	135.14
1983	120.98
1984	128.34
1985	130.41
1986	145.51
1987	152.94
1988	145.09
1989	141.91
1990	142.33
1991	141.75
1992	140.86
1993	135.23
1994	143.5
1995	126.79
1996	137.15
1997	143.86
1998	145.05
1999	148.2
2000	157.22
2001	163.83
2002	166.04
2003	170.4
2004	164.82
2005	168.59
2006	161.65
2007	164.57
2008	170.88
2009	165.1
2010	155.73
2011	159.26
2012	157.74
2013	162.11