Year	Percent
1950	10.1383
1955	9.67776
1960	9.08486
1965	8.09423
1970	8.30944
1975	9.48208
1980	9.23631
1985	8.40696
1990	8.03002
1995	7.52933
2000	8.12584
2005	8.46328
2010	8.04714
2015	6.45442
2020	5.25755
2025	5.42848
2030	6.06135
2035	6.22492
2040	6.36571
2045	6.05305
2050	5.58472
2055	5.45451
2060	5.68044
2065	5.9393
2070	6.0175
2075	5.87306
2080	5.61918
2085	5.46503
2090	5.5035
2095	5.63289
2100	5.6995