Year	Percent
1950	12.45788
1955	7.46756
1960	7.67117
1965	11.24937
1970	13.42055
1975	13.57652
1980	12.03887
1985	11.23806
1990	10.94981
1995	11.74451
2000	12.43349
2005	11.70232
2010	9.92139
2015	8.37896
2020	9.73255
2025	11.48588
2030	10.41692
2035	9.25714
2040	8.44338
2045	8.24589
2050	8.30252
2055	8.22486
2060	7.90953
2065	7.43813
2070	7.00434
2075	6.73423
2080	6.59626
2085	6.47381
2090	6.29276
2095	6.06267
2100	5.84755