Year	Grams per day
1961	49.41
1962	54.06
1963	52.23
1964	57.78
1965	61.83
1966	65.43
1967	73.5
1968	80.14
1969	83.78
1970	96.02
1971	88.26
1972	89.72
1973	80.64
1974	82.82
1975	74.48
1976	77.42
1977	83.48
1978	88.8
1979	94.08
1980	91.53
1981	77.3
1982	91.66
1983	89.14
1984	90.54
1985	91.81
1986	93.55
1987	93.33
1988	94.57
1989	96.19
1990	93.51
1991	89.8
1992	88.89
1993	87.19
1994	86.4
1995	84.35
1996	84.38
1997	82.94
1998	83.91
1999	82.32
2000	78.41
2001	80.76
2002	81.55
2003	82.32
2004	82.45
2005	78.57
2006	75.65
2007	82.52
2008	77.8
2009	75.6
2010	69.43
2011	76.3
2012	75.24
2013	74.2