Year	Grams per day
1961	79.73
1962	82.55
1963	82.42
1964	79.13
1965	85.66
1966	90.22
1967	95.58
1968	86.55
1969	91.02
1970	90.23
1971	89.76
1972	86.7
1973	87.09
1974	87.52
1975	87.8
1976	78.63
1977	77.18
1978	99.3
1979	107.17
1980	122.48
1981	90.79
1982	95.4
1983	106.73
1984	100.11
1985	98.7
1986	97.24
1987	86.08
1988	90.47
1989	98.89
1990	98.93
1991	99.97
1992	101.2
1993	99.2
1994	103.54
1995	109.24
1996	132.99
1997	131.23
1998	133.87
1999	122.42
2000	125.41
2001	126.31
2002	131.16
2003	132.61
2004	125.98
2005	130.51
2006	129.38
2007	131.58
2008	128.42
2009	127.91
2010	124.09
2011	122.22
2012	121.39
2013	121.18