Year	Grams per day
1961	86.8
1962	78.74
1963	90.4
1964	84.94
1965	86.7
1966	89.63
1967	99.77
1968	95.43
1969	109.96
1970	108.1
1971	116.98
1972	91.53
1973	96.61
1974	97.81
1975	89.51
1976	91.92
1977	92.67
1978	92.78
1979	101.96
1980	99.66
1981	92.49
1982	100.11
1983	94.96
1984	75.27
1985	91.04
1986	91.04
1987	94.58
1988	92.99
1989	82.18
1990	104.14
1991	101.75
1992	80
1993	63.37
1994	72.43
1995	78.36
1996	67.93
1997	62.08
1998	64.48
1999	60.48
2000	65.54
2001	67.2
2002	65.38
2003	67.47
2004	69.15
2005	70.14
2006	71.93
2007	71.64
2008	68.95
2009	69.69
2010	71.26
2011	70.98
2012	70.49
2013	70.87