Year	Percent
1950	8.81346
1955	8.72077
1960	9.75773
1965	8.84156
1970	7.65688
1975	7.90349
1980	11.43335
1985	10.20619
1990	9.87939
1995	7.7596
2000	8.12937
2005	7.15547
2010	7.43898
2015	7.16725
2020	7.03195
2025	7.11289
2030	7.08525
2035	6.64471
2040	6.37213
2045	6.30415
2050	6.2471
2055	6.0698
2060	5.81451
2065	5.50945
2070	5.27555
2075	5.10314
2080	4.95932
2085	4.81563
2090	4.67248
2095	4.54243
2100	4.45602