Year	Grams per day
1961	100.45
1962	109.38
1963	118.21
1964	113.06
1965	137.05
1966	137.77
1967	143.29
1968	143.82
1969	139.27
1970	138.77
1971	140.72
1972	136.97
1973	143.58
1974	140.59
1975	135.94
1976	144.19
1977	142.68
1978	151.21
1979	144.53
1980	144.38
1981	138.89
1982	142.62
1983	144.52
1984	134.63
1985	138.89
1986	135.7
1987	143.46
1988	142.21
1989	140.95
1990	130.16
1991	130.87
1992	133.05
1993	132.52
1994	135.21
1995	140.57
1996	141.59
1997	142.31
1998	139.81
1999	144.77
2000	135.11
2001	141.71
2002	143.77
2003	147.49
2004	149.66
2005	149.27
2006	136.78
2007	137.37
2008	161.9
2009	174
2010	170.73
2011	164.66
2012	167.55
2013	167.95