Year	Grams per day
1961	66.71
1962	66.86
1963	65.47
1964	65.78
1965	49.13
1966	46.32
1967	59.07
1968	57.09
1969	53.18
1970	59.06
1971	60.04
1972	67.41
1973	56.94
1974	70.61
1975	62.27
1976	69.27
1977	73.02
1978	72.03
1979	71.04
1980	73.69
1981	76.78
1982	74.58
1983	75.09
1984	73.25
1985	71.48
1986	72.3
1987	73.38
1988	77.4
1989	75.69
1990	77.8
1991	78.27
1992	85.89
1993	82.3
1994	80.49
1995	79.42
1996	83.18
1997	82.52
1998	82.76
1999	84.18
2000	78.91
2001	78.42
2002	87.43
2003	97.75
2004	96.31
2005	92.69
2006	95.99
2007	96.18
2008	95.35
2009	98.92
2010	95.3
2011	98.31
2012	95.69
2013	95.52