Year	Grams per day
1961	61.68
1962	75.09
1963	73.04
1964	82.77
1965	84.66
1966	93.64
1967	92.59
1968	97.15
1969	101.63
1970	101.45
1971	107.48
1972	112.37
1973	103.09
1974	101.08
1975	94.08
1976	109.28
1977	113.95
1978	121.95
1979	120.14
1980	100.23
1981	101.12
1982	82.13
1983	91.67
1984	101.73
1985	101.37
1986	92.55
1987	95.58
1988	107.24
1989	108.19
1990	106.28
1991	114.41
1992	129.7
1993	122.96
1994	131.73
1995	128.19
1996	129.86
1997	133.55
1998	139.01
1999	140.68
2000	133.26
2001	104.92
2002	102.1
2003	104.16
2004	105.57
2005	102.73
2006	102.7
2007	137.29
2008	130.86
2009	133.9
2010	144.63
2011	138.07
2012	130.62
2013	123.01