Year	Grams per day
1961	123.72
1962	113.69
1963	89.33
1964	117.6
1965	119.68
1966	128.1
1967	124.61
1968	127.27
1969	136.15
1970	139.53
1971	135.97
1972	136.77
1973	139.99
1974	133.03
1975	122.59
1976	121.81
1977	113.29
1978	104.59
1979	91.46
1980	104.77
1981	99.86
1982	100.01
1983	101.68
1984	96.79
1985	101.23
1986	93.08
1987	97.05
1988	105.68
1989	112.33
1990	115.85
1991	111.21
1992	118.9
1993	120.46
1994	110.4
1995	109.62
1996	104.02
1997	105.29
1998	100.65
1999	100.42
2000	105.35
2001	95.78
2002	95.28
2003	94.06
2004	95.43
2005	93.23
2006	91.4
2007	94.38
2008	81.94
2009	92.66
2010	84.36
2011	85.82
2012	86.84
2013	86.78