Year	Grams per day
1961	77.3
1962	73.75
1963	78.45
1964	79.95
1965	81.91
1966	82.81
1967	75.03
1968	67.4
1969	65.18
1970	62.75
1971	67.35
1972	63.94
1973	71.75
1974	77.04
1975	72.09
1976	70.42
1977	79.73
1978	75.44
1979	77.27
1980	84.87
1981	83.58
1982	83.38
1983	80.83
1984	88.57
1985	94.79
1986	100.05
1987	104.42
1988	103.37
1989	103.19
1990	102.07
1991	99.25
1992	102.64
1993	100.83
1994	102.15
1995	104.6
1996	103.2
1997	104.1
1998	105.35
1999	107.78
2000	103.35
2001	110.15
2002	106.63
2003	98.97
2004	105.23
2005	99.97
2006	106.79
2007	112.4
2008	116.62
2009	115.54
2010	112.4
2011	112.97
2012	109.62
2013	105.86