Year	Grams per day
1961	10.91
1962	11.84
1963	12.33
1964	11.57
1965	21.06
1966	18.16
1967	20.76
1968	18.03
1969	22.57
1970	23.45
1971	28.33
1972	24.06
1973	27.91
1974	33.56
1975	34.07
1976	33.85
1977	35.84
1978	36.99
1979	37.88
1980	31.95
1981	35.61
1982	35.24
1983	36.55
1984	39.55
1985	38.56
1986	38.95
1987	45.37
1988	44.92
1989	49.03
1990	52.02
1991	49.85
1992	59.69
1993	62.42
1994	66.78
1995	74.75
1996	77.17
1997	79.14
1998	83.26
1999	78.68
2000	79.71
2001	82.86
2002	84.75
2003	87.18
2004	91.6
2005	88.19
2006	104.36
2007	101.31
2008	104.19
2009	105.17
2010	107.72
2011	110.97
2012	107.89
2013	109.42