Year	Percent
1950	10.60803
1955	9.98073
1960	8.81176
1965	9.4565
1970	8.80934
1975	11.926
1980	11.57017
1985	12.0099
1990	10.92617
1995	9.98471
2000	9.62645
2005	10.03542
2010	10.18452
2015	9.91046
2020	8.22616
2025	7.38318
2030	6.78205
2035	7.60409
2040	7.13133
2045	6.5498
2050	5.9891
2055	5.57367
2060	5.39157
2065	5.34471
2070	5.28041
2075	5.09517
2080	4.81225
2085	4.6081
2090	4.52926
2095	4.54674
2100	4.56348