Year	Percent
1950	12.59575
1955	11.44171
1960	11.75209
1965	12.9918
1970	13.65024
1975	13.62805
1980	13.11801
1985	12.46136
1990	11.89254
1995	11.70038
2000	11.3478
2005	11.02477
2010	10.25535
2015	9.99512
2020	9.61345
2025	9.17711
2030	8.6465
2035	8.15321
2040	7.71387
2045	7.31188
2050	6.9386
2055	6.59301
2060	6.28132
2065	6.00519
2070	5.77094
2075	5.57638
2080	5.41654
2085	5.27578
2090	5.16194
2095	5.0675
2100	4.99561