Year	Grams per day
1961	48.62
1962	49.2
1963	50.14
1964	51.77
1965	56.63
1966	66.4
1967	65.8
1968	66.13
1969	68.17
1970	67.87
1971	64.58
1972	51.93
1973	44.26
1974	21.02
1975	12.63
1976	15
1977	23.86
1978	39.67
1979	51.81
1980	47.67
1981	43.55
1982	40.89
1983	49.36
1984	52.76
1985	64.15
1986	64.01
1987	60.02
1988	55.38
1989	62.33
1990	51.64
1991	67.65
1992	66.61
1993	52.01
1994	70.38
1995	51.58
1996	66.2
1997	77.85
1998	85.71
1999	74.33
2000	85.19
2001	83.76
2002	85.87
2003	78.48
2004	75.97
2005	72.42
2006	83.01
2007	72.18
2008	88.19
2009	69.83
2010	79.4
2011	75.43
2012	74.55
2013	73.37