Year	Percent
1950	7.03254
1955	7.0464
1960	7.00179
1965	9.88311
1970	12.28468
1975	12.1342
1980	12.21495
1985	12.33136
1990	14.88207
1995	12.88845
2000	13.76336
2005	12.21781
2010	12.31351
2015	12.92724
2020	12.77998
2025	12.28627
2030	11.58699
2035	11.14477
2040	10.84565
2045	10.52212
2050	10.14415
2055	9.76569
2060	9.38293
2065	9.02537
2070	8.68514
2075	8.38396
2080	8.10912
2085	7.8436
2090	7.57466
2095	7.33054
2100	7.08528