Year	Percent
1950	13.90179
1955	19.89593
1960	19.69662
1965	18.23578
1970	16.08467
1975	15.97194
1980	14.79358
1985	14.02019
1990	13.16421
1995	12.60498
2000	10.4645
2005	9.02212
2010	8.08569
2015	8.01476
2020	7.43298
2025	6.79244
2030	6.21934
2035	5.76535
2040	5.44654
2045	5.28489
2050	5.18964
2055	5.05057
2060	4.89626
2065	4.76538
2070	4.69775
2075	4.68573
2080	4.70116
2085	4.6917
2090	4.65531
2095	4.6084
2100	4.57494