Year	Percent
1950	11.53438
1955	11.2036
1960	11.41676
1965	12.03889
1970	12.2646
1975	12.61522
1980	12.47886
1985	11.99883
1990	11.90363
1995	11.17087
2000	10.97768
2005	10.2876
2010	9.30248
2015	8.80106
2020	8.46412
2025	8.27918
2030	7.7804
2035	7.27064
2040	6.80836
2045	6.43466
2050	6.14656
2055	5.91319
2060	5.68599
2065	5.4618
2070	5.26832
2075	5.11736
2080	5.00523
2085	4.91801
2090	4.84363
2095	4.77242
2100	4.7068