Year	Percent
1950	12.2808
1955	15.81382
1960	16.46365
1965	16.10579
1970	15.80254
1975	14.20205
1980	13.09922
1985	12.17567
1990	11.66317
1995	10.43897
2000	9.03008
2005	8.84116
2010	8.22384
2015	8.31004
2020	7.51311
2025	6.54526
2030	6.06979
2035	6.01378
2040	6.11193
2045	6.10309
2050	5.88041
2055	5.56322
2060	5.34402
2065	5.29655
2070	5.33353
2075	5.33435
2080	5.2294
2085	5.0569
2090	4.90785
2095	4.83973
2100	4.83009