Year	Grams per day
1961	78.07
1962	79.86
1963	82.69
1964	81.24
1965	88.16
1966	83.3
1967	81.66
1968	79.97
1969	80.47
1970	87.34
1971	90.15
1972	96.64
1973	97.06
1974	100.55
1975	102.77
1976	109.47
1977	98.24
1978	96.04
1979	93.87
1980	75.42
1981	98.88
1982	66.2
1983	90.09
1984	72.06
1985	88.12
1986	93.21
1987	95.89
1988	98.6
1989	82.27
1990	69.98
1991	73.71
1992	67.71
1993	58.11
1994	49.6
1995	39.99
1996	43.22
1997	42.44
1998	51.04
1999	48.95
2000	47.28
2001	52.07
2002	55.77
2003	57.24
2004	56.6
2005	61.9
2006	58.62
2007	58.53
2008	62.55
2009	62.01
2010	62
2011	63.32
2012	64.05
2013	62.93