Year	Percent
1950	10.34331
1955	9.34455
1960	9.06019
1965	8.94264
1970	9.90234
1975	9.57457
1980	8.56391
1985	8.27457
1990	7.65037
1995	8.02125
2000	8.60754
2005	7.75227
2010	6.18832
2015	5.22834
2020	5.36843
2025	5.97427
2030	6.11028
2035	6.23985
2040	5.94584
2045	5.50254
2050	5.38529
2055	5.6098
2060	5.85951
2065	5.93261
2070	5.79192
2075	5.54942
2080	5.40674
2085	5.45257
2090	5.58306
2095	5.64426
2100	5.56899