Year	Percent
1950	12.48635
1955	11.8867
1960	8.49502
1965	10.63108
1970	11.52428
1975	11.39233
1980	11.24074
1985	9.76838
1990	8.88228
1995	7.86096
2000	7.85945
2005	7.93044
2010	7.09964
2015	6.93179
2020	5.29166
2025	5.21575
2030	4.96644
2035	5.01315
2040	5.16125
2045	5.11532
2050	4.85497
2055	4.63715
2060	4.59796
2065	4.70431
2070	4.85969
2075	4.9395
2080	4.89329
2085	4.80679
2090	4.78217
2095	4.84182
2100	4.93136