Year	Percent
1950	13.02507
1955	12.29937
1960	15.07436
1965	14.55554
1970	13.53095
1975	13.51366
1980	12.31176
1985	9.62569
1990	11.49244
1995	10.52038
2000	9.61428
2005	9.69043
2010	8.89173
2015	8.10124
2020	7.6263
2025	7.34554
2030	7.07455
2035	6.72931
2040	6.3554
2045	6.05274
2050	5.85196
2055	5.73458
2060	5.63519
2065	5.51073
2070	5.36329
2075	5.23077
2080	5.13091
2085	5.08132
2090	5.04306
2095	4.99589
2100	4.93164