Year	Grams per day
1961	143.24
1962	144.04
1963	145.08
1964	145.02
1965	144.4
1966	145.29
1967	144.11
1968	143.24
1969	138.59
1970	143.01
1971	161.4
1972	143.46
1973	156.97
1974	163.08
1975	165.27
1976	167.93
1977	168.75
1978	171.7
1979	177.68
1980	178.74
1981	191.27
1982	177.41
1983	187.2
1984	165.82
1985	163.3
1986	163.77
1987	155.26
1988	165.24
1989	149.75
1990	142.43
1991	124.02
1992	136.54
1993	125.84
1994	138.11
1995	136.84
1996	156.82
1997	159.77
1998	146.1
1999	149.82
2000	148.72
2001	150.73
2002	149.23
2003	149.84
2004	147.85
2005	150.88
2006	150.54
2007	152.81
2008	160.24
2009	159.77
2010	160.64
2011	158.63
2012	159.9
2013	160.09