Year	Percent
1950	11.86217
1955	17.1485
1960	18.76814
1965	19.1242
1970	16.94789
1975	16.10608
1980	15.80181
1985	16.05824
1990	16.16006
1995	14.87545
2000	11.83602
2005	10.01461
2010	10.6613
2015	10.71369
2020	9.8369
2025	8.60542
2030	7.6659
2035	7.25007
2040	7.09494
2045	6.89761
2050	6.52624
2055	6.12277
2060	5.82457
2065	5.68675
2070	5.6335
2075	5.57553
2080	5.46706
2085	5.32251
2090	5.19684
2095	5.12551
2100	5.09893