Year	Grams per day
1961	140.82
1962	146.6
1963	143.63
1964	140.23
1965	145.49
1966	146.54
1967	146.12
1968	142.43
1969	144.05
1970	149.12
1971	145.22
1972	140.76
1973	150.22
1974	148.72
1975	139.07
1976	146.81
1977	125.82
1978	131.9
1979	126.16
1980	130.08
1981	130.6
1982	134.18
1983	133.93
1984	125.08
1985	125.87
1986	124.27
1987	126.42
1988	120.75
1989	116.2
1990	122.27
1991	131.48
1992	134.69
1993	141.45
1994	142.3
1995	138.01
1996	132.3
1997	146.2
1998	138.56
1999	135.73
2000	147.07
2001	142.39
2002	157.86
2003	158.12
2004	158.6
2005	139.11
2006	147.84
2007	171.75
2008	146.57
2009	143.55
2010	146.8
2011	145.96
2012	151.92
2013	151.91