Year	Percent
1950	8.82984
1955	8.69416
1960	9.19766
1965	9.19193
1970	9.30009
1975	10.01607
1980	10.99922
1985	11.41205
1990	11.76563
1995	12.23494
2000	12.33876
2005	11.89199
2010	10.84474
2015	9.95925
2020	10.33172
2025	10.92333
2030	10.51857
2035	9.77788
2040	9.23884
2045	8.89243
2050	8.68095
2055	8.49718
2060	8.2636
2065	7.95363
2070	7.6171
2075	7.31952
2080	7.07598
2085	6.87245
2090	6.66622
2095	6.46304
2100	6.26669