Year	Percent
1950	12.94534
1955	13.16455
1960	11.9144
1965	14.76457
1970	13.28368
1975	11.79775
1980	9.58167
1985	9.59268
1990	9.5503
1995	8.98223
2000	9.54531
2005	7.79173
2010	5.51151
2015	5.75099
2020	4.97224
2025	4.61516
2030	4.47984
2035	4.36461
2040	4.26886
2045	3.94924
2050	3.66615
2055	3.52946
2060	3.50061
2065	3.50708
2070	3.48211
2075	3.42498
2080	3.36387
2085	3.34585
2090	3.39924
2095	3.49277
2100	3.59474