Year	Grams per day
1961	124.36
1962	124.4
1963	124.71
1964	121.96
1965	121.24
1966	121.36
1967	119.98
1968	128.06
1969	126.27
1970	123.09
1971	121.97
1972	122.51
1973	126.55
1974	125.79
1975	123.29
1976	125.17
1977	118.35
1978	126.53
1979	127.29
1980	123.52
1981	121.4
1982	123.01
1983	117.97
1984	115.47
1985	109.62
1986	116.18
1987	113.54
1988	123.8
1989	119.91
1990	136.44
1991	127.05
1992	129.59