Year	Percent
1950	21.46149
1955	19.7512
1960	22.18838
1965	20.13285
1970	14.56072
1975	14.61481
1980	13.83385
1985	15.19047
1990	15.90024
1995	12.16521
2000	10.58414
2005	9.27352
2010	9.49786
2015	9.49724
2020	8.91844
2025	7.86762
2030	6.8608
2035	6.30495
2040	6.16193
2045	6.06153
2050	5.78212
2055	5.35409
2060	4.95385
2065	4.73247
2070	4.69249
2075	4.70928
2080	4.64661
2085	4.49325
2090	4.30681
2095	4.19284
2100	4.1908