Year	Grams per day
1961	56.7
1962	77.71
1963	63.88
1964	58.78
1965	67.54
1966	65.23
1967	79.07
1968	86.8
1969	95.08
1970	97.41
1971	86.88
1972	95.91
1973	75.66
1974	81.13
1975	103.63
1976	54.19
1977	68.12
1978	80.43
1979	105.72
1980	91.13
1981	84.45
1982	95.55
1983	73.08
1984	69.47
1985	88.73
1986	87.14
1987	81.37
1988	83.62
1989	80.28
1990	81.67
1991	102.04
1992	95.26
1993	98.65
1994	97.82
1995	98.06
1996	99.18
1997	108.29
1998	112.66
1999	118.19
2000	116.23
2001	123.28
2002	126.39
2003	128.5
2004	126.56
2005	125.32
2006	125.77
2007	123.78
2008	131.35
2009	125.07
2010	123.07
2011	127.18
2012	123.76
2013	121.83