Year	Grams per day
1961	75.57
1962	96.36
1963	98.78
1964	88.77
1965	82.12
1966	78.97
1967	83.99
1968	82.08
1969	103.1
1970	100.96
1971	107.41
1972	110.97
1973	88.62
1974	89.05
1975	83.64
1976	94.57
1977	99.23
1978	104.01
1979	103.54
1980	104.55
1981	102.26
1982	96.29
1983	92.46
1984	99.25
1985	91.72
1986	98.83
1987	103.41
1988	101.04
1989	106.12
1990	106.23
1991	106.4
1992	118.56
1993	118.19
1994	119.45
1995	121.92
1996	124.17
1997	126.17
1998	128
1999	130.64
2000	125.34
2001	121.7
2002	123.99
2003	116.6
2004	119.39
2005	119.49
2006	119.08
2007	129.23
2008	130.35
2009	130.43
2010	133.08
2011	133.36
2012	132.61
2013	131.06