Year	Grams per day
1961	47.13
1962	46.02
1963	46.46
1964	45.69
1965	45.58
1966	44.8
1967	43.99
1968	43.56
1969	44.58
1970	44.88
1971	45.52
1972	44.85
1973	43.72
1974	45.94
1975	45.79
1976	47.45
1977	37.27
1978	45.45
1979	48.09
1980	54.82
1981	60.07
1982	63.06
1983	62.76
1984	62.08
1985	60.72
1986	62.35
1987	66.05
1988	67.5
1989	65.25
1990	65.05
1991	75.15
1992	79.59
1993	68.5
1994	66.32
1995	62.77
1996	60.89
1997	65.97
1998	66.03
1999	66.34
2000	65.39
2001	67.04
2002	67.58
2003	81.01
2004	77.62
2005	79.27
2006	81.4
2007	84.93
2008	79.12
2009	83.22
2010	93.39
2011	81.88
2012	80.43
2013	84.98