Year	Percent
1950	12.16143
1955	12.15328
1960	12.23034
1965	12.21196
1970	12.83516
1975	13.86584
1980	12.90912
1985	11.53985
1990	11.42103
1995	11.24652
2000	11.22215
2005	10.41176
2010	9.67609
2015	9.20695
2020	8.83342
2025	8.44407
2030	7.99499
2035	7.54607
2040	7.15319
2045	6.79745
2050	6.49156
2055	6.22675
2060	5.97696
2065	5.76171
2070	5.57421
2075	5.42102
2080	5.296
2085	5.19185
2090	5.10365
2095	5.03113
2100	4.96684