Year	Percent
1950	13.0164
1955	15.02762
1960	15.46315
1965	16.44877
1970	15.33226
1975	14.94647
1980	15.28734
1985	16.21196
1990	16.65339
1995	15.5683
2000	13.50052
2005	14.09344
2010	14.02252
2015	14.09887
2020	13.3401
2025	12.36817
2030	11.46384
2035	10.84242
2040	10.43182
2045	9.97101
2050	9.35184
2055	8.66608
2060	8.05857
2065	7.58951
2070	7.20425
2075	6.8619
2080	6.50586
2085	6.17702
2090	5.90299
2095	5.70105
2100	5.55048