Year	Percent
1950	11.29241
1955	11.30023
1960	11.116
1965	11.57602
1970	11.82472
1975	11.76528
1980	11.63733
1985	12.2681
1990	13.0972
1995	12.05395
2000	11.74339
2005	11.9607
2010	12.32921
2015	12.59647
2020	12.53747
2025	12.29346
2030	11.93014
2035	11.71169
2040	11.4888
2045	11.19253
2050	10.80423
2055	10.38394
2060	9.95875
2065	9.55782
2070	9.17797
2075	8.80615
2080	8.45612
2085	8.11755
2090	7.80621
2095	7.51149
2100	7.23636