Year	Percent
1950	13.01134
1955	12.11358
1960	13.29043
1965	13.60831
1970	13.95177
1975	13.62411
1980	13.00563
1985	13.60574
1990	14.88593
1995	14.22702
2000	13.37216
2005	12.70954
2010	11.88187
2015	11.31971
2020	10.60126
2025	10.0413
2030	9.44657
2035	8.88585
2040	8.38323
2045	7.93041
2050	7.545
2055	7.17729
2060	6.8662
2065	6.58825
2070	6.36609
2075	6.18306
2080	6.02649
2085	5.88597
2090	5.76532
2095	5.6644
2100	5.58031