Year	Grams per day
1961	56.31
1962	65.69
1963	62.16
1964	61.14
1965	69.54
1966	67.76
1967	63.85
1968	69.29
1969	71.37
1970	75.9
1971	71.24
1972	74.24
1973	61.35
1974	67.61
1975	67.47
1976	67.79
1977	66.49
1978	67.25
1979	66.75
1980	67.46
1981	73.2
1982	64.85
1983	67.49
1984	58.01
1985	65.28
1986	63.75
1987	63
1988	61.03
1989	66.89
1990	60.4
1991	75.5
1992	61.74
1993	67.95
1994	64.77
1995	61.34
1996	65.68
1997	59.95
1998	65.33
1999	71
2000	71.14
2001	69.73
2002	68.7
2003	71.39
2004	80.28
2005	84.7
2006	85.2
2007	85.24
2008	101.56
2009	77.61
2010	79.19
2011	82.88
2012	80.98
2013	89.52