Year	Grams per day
1961	163.3
1962	164.45
1963	171.75
1964	166.37
1965	165.1
1966	183.8
1967	170.41
1968	164.86
1969	157.01
1970	154.7
1971	145.76
1972	136.46
1973	141.36
1974	136.87
1975	123.85
1976	140.89
1977	165.12
1978	167.7
1979	169.99
1980	152.96
1981	158.5
1982	150.37
1983	153.93
1984	152.98
1985	148.41
1986	153.2
1987	159.91
1988	162.3
1989	157.14
1990	152.76
1991	156.27
1992	155.78
1993	155.77
1994	162.93
1995	166.31
1996	159.44
1997	166.24
1998	159.99
1999	154.36
2000	147
2001	141.62
2002	144.53
2003	144.06
2004	137.8
2005	130.57
2006	128.66
2007	127.35
2008	127.94
2009	132.71
2010	133.68
2011	129.69
2012	131.92
2013	131.98