Year	Percent
1950	11.78119
1955	11.19874
1960	11.44258
1965	13.02094
1970	12.83443
1975	12.5122
1980	12.59783
1985	12.93498
1990	13.36708
1995	13.35201
2000	12.7368
2005	12.8711
2010	12.58777
2015	12.06054
2020	10.74998
2025	10.10622
2030	9.66918
2035	9.17905
2040	8.64653
2045	8.11019
2050	7.62079
2055	7.1855
2060	6.80925
2065	6.48082
2070	6.1982
2075	5.93478
2080	5.7114
2085	5.51955
2090	5.36972
2095	5.24179
2100	5.13691