Year	Percent
1950	11.90459
1955	14.30502
1960	14.22985
1965	14.77791
1970	14.28943
1975	14.32595
1980	10.9305
1985	11.30693
1990	8.5286
1995	8.41347
2000	8.22356
2005	8.05547
2010	7.48273
2015	6.34788
2020	5.87364
2025	5.2522
2030	5.30389
2035	5.59653
2040	5.62784
2045	5.36257
2050	5.04095
2055	4.83034
2060	4.81518
2065	4.94809
2070	5.02727
2075	4.94448
2080	4.74396
2085	4.57133
2090	4.51269
2095	4.56003
2100	4.6331