Year	Grams per day
1961	91.85
1962	93.38
1963	89.47
1964	96.27
1965	96.02
1966	89.98
1967	90.25
1968	95.6
1969	93.22
1970	97.41
1971	95.21
1972	100.18
1973	101.07
1974	96.47
1975	99.48
1976	91.57
1977	88.42
1978	91.07
1979	94.8
1980	88.44
1981	82.38
1982	94.41
1983	92.57
1984	102.86
1985	75
1986	89.5
1987	76.57
1988	78.66
1989	103.16
1990	74.46
1991	81.08
1992	63.51
1993	77.15
1994	84.99
1995	87.47
1996	123.04
1997	121.92
1998	127.08
1999	134.62
2000	131.62
2001	129.06
2002	157.49
2003	154.55
2004	177.44
2005	162.76
2006	149.47
2007	149.78
2008	160.29
2009	165.36
2010	173.1