Year	Grams per day
1961	80.94
1962	81
1963	81.27
1964	82.07
1965	82.19
1966	82.92
1967	83.55
1968	85.14
1969	86.38
1970	86.91
1971	88.64
1972	88.18
1973	89.73
1974	89
1975	88.48
1976	88.72
1977	89.94
1978	89.49
1979	90.49
1980	79.17
1981	77.36
1982	75.78
1983	76.09
1984	76.07
1985	85.88
1986	73.97
1987	64.42
1988	70.77
1989	73.67
1990	75.51
1991	76.14
1992	76.22
1993	73.64
1994	71.67
1995	70.93
1996	68.37
1997	70.3
1998	71.91
1999	79.13
2000	78.77
2001	90.35
2002	92.62
2003	98.99
2004	102.5
2005	109.92
2006	112.02
2007	111.2
2008	106.03
2009	108.84
2010	99.49
2011	108.64
2012	107.95
2013	104.33