Year	Percent
1950	14.08408
1955	11.16452
1960	8.86528
1965	8.63745
1970	8.93628
1975	9.40232
1980	7.60109
1985	6.5171
1990	5.67298
1995	5.06695
2000	4.88238
2005	4.62943
2010	4.53622
2015	4.43126
2020	4.2789
2025	4.16767
2030	4.13897
2035	4.17867
2040	4.24486
2045	4.29801
2050	4.32253
2055	4.32867
2060	4.34964
2065	4.41146
2070	4.48986
2075	4.55276
2080	4.59042
2085	4.59181
2090	4.5762
2095	4.56508
2100	4.5599