Year	Percent
1950	13.88992
1955	15.09992
1960	18.10671
1965	18.58522
1970	17.43785
1975	15.15084
1980	13.57406
1985	13.31276
1990	12.46907
1995	11.85553
2000	11.19797
2005	9.68888
2010	8.37599
2015	7.41803
2020	8.04483
2025	7.38187
2030	6.65674
2035	6.00251
2040	5.51708
2045	5.26449
2050	5.1344
2055	4.98467
2060	4.73211
2065	4.40715
2070	4.16076
2075	4.03087
2080	3.99683
2085	3.9774
2090	3.90492
2095	3.7762
2100	3.64857