Year	Grams per day
1961	146.47
1962	149.58
1963	122.12
1964	139.23
1965	138.15
1966	137.6
1967	133.47
1968	146.74
1969	142.89
1970	146.09
1971	141.87
1972	155.83
1973	138.8
1974	147.4
1975	101.58
1976	118.11
1977	143.18
1978	122.76
1979	125.47
1980	126.88
1981	132.31
1982	123.64
1983	139.24
1984	131.8
1985	128.26
1986	134.7
1987	132.21
1988	143.4
1989	137.26
1990	139.73
1991	123.06
1992	133.84
1993	137.29
1994	123.77
1995	133.33
1996	143.67
1997	141.2
1998	132.52
1999	138.01
2000	149.18
2001	147.33
2002	156.58
2003	155.79
2004	162.79
2005	161.25
2006	164.23
2007	161.52
2008	162.81
2009	159.24
2010	160.87
2011	159.5
2012	165.33
2013	165.51