Year	Grams per day
1961	122.63
1962	123.17
1963	119.93
1964	131.04
1965	125.79
1966	130.73
1967	120.54
1968	133.84
1969	132.95
1970	143.36
1971	152.18
1972	158.84
1973	170.55
1974	172.33
1975	175.43
1976	169.25
1977	177.52
1978	175.17
1979	168.49
1980	169.24
1981	180.01
1982	180.41
1983	167.62
1984	169.9
1985	187.11
1986	180.42
1987	176.72
1988	172.09
1989	161.17
1990	165.2
1991	164.2
1992	165.8
1993	165.5
1994	164.02
1995	161.73
1996	159.23
1997	156.84
1998	158.03
1999	158.41
2000	154.63
2001	151.2
2002	151.77
2003	153.4
2004	151.54
2005	156.78
2006	157.53
2007	161.16
2008	153.91
2009	150.49
2010	149.88
2011	148.56
2012	149.09
2013	144.01