Year	Grams per day
1961	51.64
1962	51.13
1963	49.29
1964	49.83
1965	50.83
1966	58.62
1967	59.83
1968	66.67
1969	73.82
1970	74.58
1971	75.15
1972	74.95
1973	76.77
1974	75.92
1975	77.43
1976	69.91
1977	71.66
1978	72.07
1979	73.32
1980	74.8
1981	74.8
1982	74.84
1983	70.99
1984	68.57
1985	70.74
1986	75.54
1987	75.47
1988	77.3
1989	82.45
1990	75.73
1991	84.08
1992	83
1993	86.12
1994	86.63
1995	79.56
1996	86.67
1997	85.66
1998	86.59
1999	89.52
2000	89.56
2001	88.96
2002	88.26
2003	89.83
2004	84.37
2005	84.11
2006	81.67
2007	78.97
2008	82.63
2009	79.45
2010	80.45
2011	77.78
2012	77.63
2013	78.01