Year	Percent
1950	12.63577
1955	11.82794
1960	13.0122
1965	13.32883
1970	13.66514
1975	13.30254
1980	12.67448
1985	13.26721
1990	14.45384
1995	13.80972
2000	12.98392
2005	12.3315
2010	11.54379
2015	11.00392
2020	10.29925
2025	9.7495
2030	9.16532
2035	8.61253
2040	8.11029
2045	7.65338
2050	7.26212
2055	6.88919
2060	6.57083
2065	6.28562
2070	6.05411
2075	5.86062
2080	5.696
2085	5.55198
2090	5.42883
2095	5.32606
2100	5.24292