Year	Grams per day
1961	72.57
1962	77.42
1963	77.17
1964	79.94
1965	81.75
1966	84.52
1967	83.15
1968	85.49
1969	89
1970	91.53
1971	94.14
1972	106.25
1973	104.89
1974	108.88
1975	113.07
1976	113.53
1977	118.75
1978	123.89
1979	130.6
1980	131.67
1981	109.62
1982	106.76
1983	105.61
1984	101.68
1985	101.93
1986	106.82
1987	87.25
1988	85.09
1989	82.89
1990	75.73
1991	75.39
1992	77.24
1993	73.01
1994	73.78
1995	70.31
1996	57.66
1997	56.02
1998	56.97
1999	53.35
2000	52.03
2001	50.09
2002	48.98
2003	50.75
2004	49.49
2005	49.72
2006	56.17
2007	49.57
2008	54.24
2009	52.25
2010	49.01
2011	54.71
2012	58.44
2013	63.31