Year	Percent
1950	11.58865
1955	11.25482
1960	11.79763
1965	12.9603
1970	13.06078
1975	13.06968
1980	13.30186
1985	13.19351
1990	13.43071
1995	13.32434
2000	12.95903
2005	12.77878
2010	12.25192
2015	11.53427
2020	10.33791
2025	9.19201
2030	8.75744
2035	8.32384
2040	7.83471
2045	7.30549
2050	6.82374
2055	6.43049
2060	6.11444
2065	5.87341
2070	5.66905
2075	5.5013
2080	5.33324
2085	5.20522
2090	5.10841
2095	5.04447
2100	4.99476