Year	Percent
1950	11.16685
1955	10.09639
1960	9.29767
1965	10.20486
1970	11.27042
1975	11.66405
1980	12.71919
1985	11.27448
1990	11.91817
1995	10.20129
2000	10.03722
2005	8.6377
2010	8.00247
2015	6.5472
2020	7.3777
2025	7.74368
2030	7.58963
2035	6.70774
2040	6.21864
2045	6.07717
2050	6.07149
2055	6.11646
2060	6.07497
2065	5.91602
2070	5.73979
2075	5.64911
2080	5.63601
2085	5.64226
2090	5.61328
2095	5.53914
2100	5.4491