Year	Percent
1950	13.24556
1955	12.26753
1960	10.71212
1965	13.73764
1970	13.29193
1975	13.31148
1980	13.43294
1985	12.1821
1990	10.42071
1995	11.02613
2000	11.66726
2005	9.50874
2010	8.7905
2015	8.30425
2020	7.33176
2025	7.25928
2030	6.79138
2035	6.32473
2040	6.02316
2045	5.75592
2050	5.53415
2055	5.3696
2060	5.23162
2065	5.10415
2070	4.98012
2075	4.88364
2080	4.81346
2085	4.76243
2090	4.71723
2095	4.67607
2100	4.632