Year	Percent
1950	9.78216
1955	9.22935
1960	9.99085
1965	12.29376
1970	12.17934
1975	11.96156
1980	12.11561
1985	12.0049
1990	11.95382
1995	11.99928
2000	10.78999
2005	9.75286
2010	9.75779
2015	9.91792
2020	8.82467
2025	7.87213
2030	7.52384
2035	7.33596
2040	7.16903
2045	6.91388
2050	6.6085
2055	6.30509
2060	6.1014
2065	6.00874
2070	5.96266
2075	5.90667
2080	5.82348
2085	5.74139
2090	5.68087
2095	5.65832
2100	5.65086