Year	Percent
1950	14.65246
1955	18.13516
1960	17.97529
1965	17.50893
1970	16.9084
1975	16.68933
1980	17.6302
1985	18.98308
1990	16.706
1995	12.67144
2000	9.73361
2005	7.83957
2010	8.65761
2015	8.78556
2020	7.6139
2025	6.16122
2030	5.15832
2035	4.88939
2040	5.08004
2045	5.23425
2050	5.03421
2055	4.60616
2060	4.247
2065	4.15301
2070	4.30115
2075	4.5095
2080	4.58456
2085	4.49438
2090	4.34646
2095	4.28904
2100	4.36394