Year	Grams per day
1961	55.74
1962	56.73
1963	60.29
1964	68.69
1965	67.38
1966	76.84
1967	76.2
1968	88.81
1969	97.66
1970	99.12
1971	99.31
1972	94.95
1973	98.87
1974	99.81
1975	98.3
1976	104.47
1977	103.41
1978	105.63
1979	103.1
1980	105.19
1981	106.43
1982	106.91
1983	107.35
1984	108.37
1985	106.45
1986	109.24
1987	107.26
1988	107.25
1989	102.74
1990	78.67
1991	73.04
1992	89.98
1993	87.28
1994	82.31
1995	83.12
1996	77.45
1997	79.4
1998	77.07
1999	81.22
2000	79.24
2001	85.74
2002	84.7
2003	84
2004	86.1
2005	94.53
2006	97.61
2007	93.07
2008	92.69
2009	87.47
2010	72.19
2011	77.67
2012	76.52
2013	78.67