Year	Percent
1950	9.79046
1955	8.05965
1960	7.18151
1965	6.70729
1970	6.50355
1975	6.0612
1980	5.46685
1985	4.83003
1990	4.73225
1995	4.39957
2000	4.19196
2005	4.193
2010	4.15257
2015	4.30543
2020	4.51839
2025	4.81009
2030	5.15743
2035	5.51745
2040	5.92276
2045	6.39143
2050	6.94629
2055	7.60842
2060	8.33545
2065	9.09291
2070	9.90913
2075	10.7485
2080	11.567
2085	12.37896
2090	13.19022
2095	13.99844
2100	14.80698