Year	Percent
1950	14.08867
1955	15.73913
1960	17.29046
1965	17.42293
1970	17.02479
1975	16.13696
1980	15.13734
1985	14.06695
1990	12.47288
1995	11.30913
2000	10.22303
2005	10.19315
2010	9.9327
2015	9.65675
2020	8.88043
2025	8.26461
2030	7.81084
2035	7.4908
2040	7.22404
2045	6.94983
2050	6.68486
2055	6.44344
2060	6.25159
2065	6.10556
2070	5.99459
2075	5.88088
2080	5.77298
2085	5.67154
2090	5.58228
2095	5.51235
2100	5.45604