Year	Percent
1950	9.75225
1955	11.10899
1960	11.07531
1965	11.34452
1970	12.23758
1975	11.93438
1980	11.81247
1985	11.92633
1990	9.25243
1995	8.09436
2000	7.98172
2005	8.4613
2010	8.79053
2015	9.07801
2020	8.33135
2025	7.64609
2030	7.29456
2035	7.12582
2040	6.9705
2045	6.72686
2050	6.43409
2055	6.18209
2060	6.00224
2065	5.88634
2070	5.77602
2075	5.64909
2080	5.51024
2085	5.39547
2090	5.31076
2095	5.2821
2100	5.26593