Year	Grams per day
1961	31.29
1962	30.14
1963	18.32
1964	9.75
1965	39.81
1966	28.24
1967	51.1
1968	55.79
1969	53.49
1970	44
1971	51.91
1972	19.3
1973	20.5
1974	21.23
1975	4.69
1976	22.84
1977	40.18
1978	43.71
1979	52.25
1980	51.61
1981	56.74
1982	56.41
1983	72.15
1984	94.63
1985	82.48
1986	125.19
1987	136.81
1988	124.45
1989	128.62
1990	127.77
1991	126.61
1992	101.72
1993	102.63
1994	102.29
1995	104.6
1996	98.4
1997	98.19
1998	95.15
1999	88.63
2000	93.54
2001	72.94
2002	78.01
2003	75.03
2004	80.3
2005	81.43
2006	73.57
2007	77.87
2008	72.57
2009	69.54
2010	69.23
2011	71.19
2012	70.42
2013	72.15