Year	Grams per day
1961	58.77
1962	63.55
1963	61.06
1964	64.12
1965	72.55
1966	74.82
1967	75.91
1968	77.21
1969	75.13
1970	77.79
1971	76.57
1972	79.82
1973	85.04
1974	82.8
1975	92.83
1976	93
1977	96.92
1978	95.18
1979	95.46
1980	105.23
1981	103.62
1982	103.32
1983	93.82
1984	99.87
1985	102.35
1986	107.52
1987	108.7
1988	104.33
1989	106.77
1990	117.29
1991	116.64
1992	117.77
1993	119.54
1994	124.53
1995	123.16
1996	114.3
1997	112.5
1998	114.11
1999	119.2
2000	121
2001	117.31
2002	131.48
2003	140.43
2004	136.28
2005	144.41
2006	137.23
2007	152.39
2008	135.14
2009	147.78
2010	135.92
2011	145.41
2012	130.2
2013	131.98