Year	Percent
1950	11.10967
1955	11.62181
1960	11.40635
1965	13.88404
1970	13.73345
1975	11.40041
1980	9.7008
1985	8.91686
1990	8.71008
1995	9.21396
2000	8.52736
2005	7.62319
2010	6.22583
2015	6.12324
2020	5.63729
2025	5.70193
2030	5.42239
2035	5.30826
2040	5.1947
2045	5.08447
2050	4.703
2055	4.36381
2060	4.197
2065	4.16014
2070	4.16816
2075	4.14352
2080	4.0845
2085	4.0213
2090	4.00566
2095	4.06447
2100	4.15357