Year	Percent
1950	14.69721
1955	15.78323
1960	15.68299
1965	13.35995
1970	12.50874
1975	10.32648
1980	9.00505
1985	8.66686
1990	9.05147
1995	8.04177
2000	6.3473
2005	5.66614
2010	5.45803
2015	5.66399
2020	5.66486
2025	5.49707
2030	5.34551
2035	5.19464
2040	5.10121
2045	5.08591
2050	5.10879
2055	5.10339
2060	5.05209
2065	4.98618
2070	4.9322
2075	4.89
2080	4.86249
2085	4.82681
2090	4.77974
2095	4.72947
2100	4.6817