Year	Percent
1950	10.84601
1955	6.96313
1960	4.76526
1965	8.84965
1970	10.62569
1975	12.59386
1980	11.70896
1985	8.52406
1990	7.69147
1995	6.65013
2000	6.72607
2005	6.41386
2010	6.15643
2015	4.95712
2020	3.56548
2025	3.91088
2030	4.04316
2035	4.77248
2040	5.02261
2045	4.97486
2050	4.41035
2055	4.08509
2060	4.18229
2065	4.54161
2070	4.91225
2075	5.10453
2080	5.02893
2085	4.80152
2090	4.65364
2095	4.68773
2100	4.83013