Year	Percent
1950	10.67666
1955	10.01033
1960	9.52455
1965	8.63708
1970	11.20318
1975	11.51948
1980	10.65368
1985	10.44926
1990	10.89964
1995	11.27528
2000	11.58054
2005	11.19877
2010	10.40199
2015	9.47255
2020	8.66486
2025	8.30306
2030	7.80615
2035	7.30753
2040	6.7553
2045	6.2769
2050	5.88161
2055	5.58173
2060	5.33404
2065	5.12194
2070	4.94632
2075	4.79491
2080	4.69101
2085	4.61695
2090	4.56274
2095	4.53009
2100	4.49966