Year	Grams per day
1961	100.28
1962	118.33
1963	117.05
1964	127.8
1965	145.43
1966	144.53
1967	153.33
1968	157.02
1969	145.41
1970	136.43
1971	131.16
1972	125.4
1973	102.16
1974	77.07
1975	68.07
1976	72.48
1977	88.32
1978	97.74
1979	99.57
1980	102.85
1981	96.8
1982	112.44
1983	105.92
1984	104.49
1985	91.98
1986	100.66
1987	109.14
1988	113.06
1989	118.01
1990	120.26
1991	117.86
1992	116.65
1993	118.32
1994	115.85
1995	111.25
1996	112.64
1997	104.41
1998	100.27
1999	98.65
2000	97.94
2001	99.13
2002	101.27
2003	102.57
2004	103.27
2005	104.46
2006	104.02
2007	102.37
2008	104.49
2009	102.43
2010	104.33
2011	114.18
2012	111.79
2013	112.2