Year	Grams per day
1961	30.99
1962	31.82
1963	34.33
1964	36.56
1965	37.02
1966	37.66
1967	38.3
1968	38.58
1969	40.89
1970	40.6
1971	41.23
1972	42.8
1973	43.04
1974	44.5
1975	44.62
1976	44.82
1977	41.46
1978	44.02
1979	46.12
1980	46.9
1981	46.39
1982	46.41
1983	45.28
1984	45.11
1985	44.84
1986	48.21
1987	47.61
1988	48.28
1989	48.99
1990	49.9
1991	50.21
1992	51.18
1993	76.11
1994	97.46
1995	54.38
1996	63.02
1997	61.74
1998	56.96
1999	56.46
2000	63.37
2001	66.58
2002	70.73
2003	66.95
2004	54.96
2005	58.63
2006	67.18
2007	75.51
2008	101.79
2009	117.4
2010	113.04
2011	122.11
2012	128.51
2013	130.53