Year	Percent
1950	14.09947
1955	15.54456
1960	15.51858
1965	17.31459
1970	13.3599
1975	17.26986
1980	10.41472
1985	12.93012
1990	8.79949
1995	10.10023
2000	7.32896
2005	6.50824
2010	6.80422
2015	6.20947
2020	5.71039
2025	5.39523
2030	5.27369
2035	5.19316
2040	5.04272
2045	4.87607
2050	4.69361
2055	4.5747
2060	4.50368
2065	4.42759
2070	4.3276
2075	4.19343
2080	4.06289
2085	3.94936
2090	3.86209
2095	3.82122
2100	3.76883