Year	Grams per day
1961	125.27
1962	131.9
1963	127.8
1964	124.79
1965	129.29
1966	135.64
1967	133.01
1968	131.66
1969	137.02
1970	135.77
1971	134.52
1972	134.28
1973	132.77
1974	127.33
1975	122.22
1976	130.93
1977	130.22
1978	126.52
1979	122.68
1980	117.76
1981	117.51
1982	112.53
1983	114.72
1984	121.24
1985	121.72
1986	126.7
1987	128.45
1988	117.21
1989	112.59
1990	116.89
1991	115.35
1992	119.51
1993	124.77
1994	127.26
1995	130.28
1996	135.86
1997	141
1998	142.34
1999	134.11
2000	138.53
2001	144.88
2002	152.59
2003	153.17
2004	148.73
2005	147.43
2006	144.56
2007	146.04
2008	140.5
2009	135.65
2010	126.29
2011	137
2012	132.13
2013	132.23