Year	Percent
1950	7.92592
1955	6.29408
1960	5.38993
1965	5.0344
1970	4.92702
1975	4.94841
1980	4.97439
1985	4.95924
1990	5.15202
1995	5.10924
2000	4.96295
2005	4.74828
2010	4.58549
2015	4.77752
2020	4.93764
2025	5.07995
2030	5.2245
2035	5.46679
2040	5.87543
2045	6.44817
2050	7.20393
2055	8.10106
2060	9.09167
2065	10.17082
2070	11.33331
2075	12.53994
2080	13.7934
2085	15.09481
2090	16.44018
2095	17.81417
2100	19.20159