Year	Percent
1950	11.80669
1955	11.74025
1960	13.44281
1965	13.42169
1970	13.27372
1975	13.1211
1980	13.39489
1985	13.9417
1990	14.32658
1995	14.52721
2000	14.63567
2005	14.57278
2010	14.43339
2015	14.22202
2020	13.82222
2025	13.39013
2030	12.93191
2035	12.47696
2040	11.97872
2045	11.46117
2050	10.95873
2055	10.46449
2060	9.98604
2065	9.54875
2070	9.13315
2075	8.74734
2080	8.37736
2085	8.03472
2090	7.70045
2095	7.39226
2100	7.09434