Year	Percent
1950	11.60847
1955	11.71317
1960	12.4779
1965	11.64151
1970	12.80937
1975	13.33958
1980	12.01073
1985	10.09223
1990	10.20304
1995	10.45701
2000	10.17728
2005	9.44846
2010	8.53087
2015	7.35845
2020	6.99508
2025	6.52424
2030	6.14238
2035	5.73589
2040	5.40398
2045	5.13965
2050	4.93943
2055	4.81519
2060	4.71598
2065	4.629
2070	4.54352
2075	4.49113
2080	4.46558
2085	4.46452
2090	4.47531
2095	4.4786
2100	4.47516