Year	Percent
1950	9.95204
1955	10.48398
1960	13.91719
1965	15.36899
1970	15.18055
1975	14.54058
1980	14.19603
1985	13.29017
1990	12.90449
1995	12.51246
2000	11.79159
2005	8.82234
2010	7.85204
2015	8.1689
2020	8.34125
2025	7.81042
2030	7.34212
2035	6.52363
2040	5.9664
2045	5.82607
2050	5.89302
2055	5.90808
2060	5.7907
2065	5.57484
2070	5.37462
2075	5.30327
2080	5.35442
2085	5.41714
2090	5.40867
2095	5.32078
2100	5.21617