Year	Percent
1950	10.50013
1955	14.88659
1960	16.81265
1965	17.27773
1970	14.29365
1975	11.85701
1980	10.86047
1985	11.49126
1990	12.3735
1995	10.90994
2000	8.10529
2005	6.8737
2010	7.13819
2015	8.33472
2020	7.45283
2025	6.32753
2030	5.70737
2035	5.63529
2040	5.68507
2045	5.59765
2050	5.39458
2055	5.15552
2060	5.00415
2065	4.97898
2070	5.00795
2075	5.01416
2080	4.9754
2085	4.90743
2090	4.84323
2095	4.8113
2100	4.81328