Year	Percent
1950	12.59272
1955	12.54083
1960	12.87208
1965	13.53441
1970	14.10219
1975	14.55936
1980	14.88139
1985	15.48263
1990	15.753
1995	15.56586
2000	15.67095
2005	15.75354
2010	16.17197
2015	15.13801
2020	13.51618
2025	12.67545
2030	11.73337
2035	10.9331
2040	10.18539
2045	9.46256
2050	8.75904
2055	8.10964
2060	7.56588
2065	7.11942
2070	6.74075
2075	6.42993
2080	6.16396
2085	5.93935
2090	5.76431
2095	5.6319
2100	5.5196