Year	Percent
1950	11.64493
1955	11.72492
1960	12.50093
1965	12.75738
1970	12.87397
1975	12.88161
1980	13.13535
1985	13.23855
1990	13.02444
1995	13.95359
2000	14.6661
2005	13.9545
2010	12.61303
2015	11.55457
2020	11.43483
2025	11.26737
2030	10.95338
2035	10.28087
2040	9.59296
2045	9.06562
2050	8.6788
2055	8.29982
2060	7.88103
2065	7.4547
2070	7.07676
2075	6.77688
2080	6.54057
2085	6.33339
2090	6.14229
2095	5.9552
2100	5.80189