Year	Percent
1950	12.74239
1955	12.8068
1960	13.12006
1965	13.52723
1970	13.98172
1975	14.23712
1980	14.59196
1985	14.69122
1990	14.24777
1995	13.69883
2000	13.30766
2005	13.51266
2010	13.58671
2015	14.20027
2020	14.00429
2025	13.0471
2030	12.52322
2035	12.2848
2040	12.07854
2045	11.70122
2050	11.17892
2055	10.67965
2060	10.27493
2065	9.9214
2070	9.58535
2075	9.20899
2080	8.82326
2085	8.46643
2090	8.13788
2095	7.8531
2100	7.56039