Year	Percent
1950	11.67064
1955	10.2862
1960	6.99881
1965	7.13928
1970	11.73514
1975	10.56371
1980	13.98272
1985	13.21851
1990	11.56247
1995	10.83767
2000	12.22079
2005	13.18133
2010	11.74823
2015	10.88961
2020	9.84439
2025	9.13761
2030	8.53887
2035	8.25565
2040	7.83438
2045	7.31927
2050	6.83429
2055	6.44953
2060	6.16854
2065	5.96074
2070	5.78173
2075	5.62239
2080	5.47667
2085	5.35136
2090	5.25951
2095	5.20016
2100	5.14882