Year	Percent
1950	8.12071
1955	7.47664
1960	7.03178
1965	6.50184
1970	6.08585
1975	5.94339
1980	5.85652
1985	5.71972
1990	5.96781
1995	5.75083
2000	5.27853
2005	4.83444
2010	4.35584
2015	4.12721
2020	3.73061
2025	3.4777
2030	3.68693
2035	3.82286
2040	4.01622
2045	4.86949
2050	6.76382
2055	9.25428
2060	11.70442
2065	13.46542
2070	14.95051
2075	16.10892
2080	17.17026
2085	18.23454
2090	19.34878
2095	20.54389
2100	21.80395