Year	Grams per day
1961	69.63
1962	67.6
1963	68.74
1964	67.13
1965	71.53
1966	68.73
1967	71.29
1968	71.24
1969	82.8
1970	74.98
1971	76.73
1972	77.84
1973	85.12
1974	82.92
1975	81.68
1976	85.52
1977	87.75
1978	92.77
1979	91.87
1980	91.25
1981	93.07
1982	81.24
1983	86.55
1984	84.93
1985	83.45
1986	83.21
1987	80.96
1988	95.15
1989	98.44
1990	107.97
1991	96.81
1992	100.4
1993	105.91
1994	106.3
1995	108
1996	109.66
1997	109.65
1998	112.25
1999	111.45
2000	108.8
2001	108.58
2002	107.62
2003	114.91
2004	113.74
2005	116.36
2006	123.89
2007	126.26
2008	125.65
2009	127.59
2010	127.24
2011	124.47
2012	129.88
2013	131.36