Year	Percent
1950	8.79205
1955	9.15954
1960	7.7894
1965	7.46172
1970	7.7261
1975	7.39014
1980	6.86246
1985	5.8985
1990	5.04928
1995	5.45299
2000	6.2204
2005	6.07954
2010	5.7374
2015	5.65295
2020	4.97037
2025	5.09272
2030	5.35605
2035	5.47688
2040	5.40868
2045	5.26248
2050	5.12648
2055	5.10233
2060	5.19035
2065	5.27272
2070	5.26189
2075	5.1665
2080	5.05464
2085	4.99451
2090	4.99533
2095	5.01598
2100	5.01171