Year	Grams per day
1961	61.82
1962	66.46
1963	70.76
1964	73.59
1965	77.63
1966	81.19
1967	89.91
1968	84.24
1969	85.02
1970	86.16
1971	86.14
1972	85.59
1973	88.14
1974	92.35
1975	93.97
1976	92.87
1977	95.08
1978	93.29
1979	91.31
1980	87.49
1981	90.02
1982	89.16
1983	88.69
1984	90.52
1985	92.58
1986	104.88
1987	102.68
1988	95.51
1989	97.28
1990	71.93
1991	46.52
1992	48.62
1993	47.13
1994	47.54
1995	38.73
1996	33.38
1997	41.53
1998	42.4
1999	47.24
2000	47.18
2001	49.31
2002	51.27
2003	51.55
2004	74.6
2005	64.54
2006	69.71
2007	61.16
2008	50.79
2009	43.52
2010	52.46
2011	51.93
2012	50.37
2013	52.75