Year	Percent
1950	13.40343
1955	13.13927
1960	14.18462
1965	13.98439
1970	13.87856
1975	13.85578
1980	13.87667
1985	14.04485
1990	13.83033
1995	13.28411
2000	12.82101
2005	12.42983
2010	11.75261
2015	10.99344
2020	10.24499
2025	9.86176
2030	9.436
2035	8.98027
2040	8.50397
2045	8.05704
2050	7.64859
2055	7.2895
2060	6.96244
2065	6.66817
2070	6.39586
2075	6.15203
2080	5.93333
2085	5.74754
2090	5.584
2095	5.43909
2100	5.31401