Year	Grams per day
1961	61.35
1962	55.68
1963	77.3
1964	41.44
1965	68.12
1966	78.82
1967	60.86
1968	68.3
1969	55.6
1970	56.88
1971	49.27
1972	48.82
1973	48.51
1974	58.61
1975	61.74
1976	60.71
1977	73.02
1978	74.88
1979	77.98
1980	53.26
1981	66.33
1982	69.15
1983	80.38
1984	76.36
1985	79.84
1986	82.71
1987	88.51
1988	89.57
1989	93.46
1990	87.69
1991	74.74
1992	84.29
1993	81.53
1994	88.62
1995	100.43
1996	101.45
1997	101.31
1998	103.29
1999	107.96
2000	94.49
2001	99.17
2002	100.5
2003	102
2004	97.34
2005	97.93
2006	97.28
2007	99.04
2008	99.24
2009	97.17
2010	99.72
2011	97.82
2012	99.96
2013	98.1