Year	Percent
1950	14.50358
1955	14.34299
1960	14.27725
1965	13.04895
1970	12.86789
1975	11.65516
1980	10.80407
1985	10.16931
1990	9.44557
1995	8.56276
2000	8.5289
2005	7.98384
2010	7.38052
2015	6.78744
2020	5.91295
2025	5.59121
2030	5.34038
2035	5.16652
2040	4.95019
2045	4.71334
2050	4.51352
2055	4.38254
2060	4.33433
2065	4.32059
2070	4.3016
2075	4.26881
2080	4.24189
2085	4.23908
2090	4.28212
2095	4.34281
2100	4.38867