Year	Percent
1950	9.87933
1955	10.10732
1960	10.43363
1965	11.00358
1970	9.83942
1975	9.63746
1980	9.86136
1985	10.25204
1990	9.99694
1995	10.25975
2000	11.28056
2005	12.08663
2010	12.35999
2015	11.1264
2020	10.60238
2025	10.48699
2030	10.4702
2035	10.05304
2040	9.50864
2045	8.96796
2050	8.50003
2055	8.07643
2060	7.68108
2065	7.2958
2070	6.884
2075	6.5015
2080	6.17925
2085	5.9141
2090	5.70659
2095	5.54622
2100	5.41659