Year	Grams per day
1961	79.44
1962	67.38
1963	83.09
1964	82.4
1965	94.66
1966	74.87
1967	77.64
1968	83.03
1969	78.99
1970	80.79
1971	88.18
1972	94.64
1973	99.52
1974	93.33
1975	80.28
1976	83.49
1977	92.98
1978	96.61
1979	94.83
1980	102.09
1981	108.35
1982	106.76
1983	102.07
1984	103.81
1985	104.05
1986	100.42
1987	98.29
1988	98.1
1989	92.34
1990	86.65
1991	95.36
1992	84.67
1993	92.1
1994	97.89
1995	77.16
1996	79.1
1997	82.91
1998	87.93
1999	80.08
2000	74.62
2001	70.72
2002	78.03
2003	77.81
2004	78.11
2005	78.22
2006	79.83
2007	83.34
2008	81.91
2009	81.79
2010	84.77
2011	87.86
2012	91.31
2013	95.34