Year	Percent
1950	15.83305
1955	15.55911
1960	15.22796
1965	14.82001
1970	14.31727
1975	13.80049
1980	13.17779
1985	12.80718
1990	12.51535
1995	12.48838
2000	12.2174
2005	12.13276
2010	11.97615
2015	11.82542
2020	11.79559
2025	11.92161
2030	12.27412
2035	12.8488
2040	13.74795
2045	14.59633
2050	15.4561
2055	16.31342
2060	17.23233
2065	18.2397
2070	19.20811
2075	20.12453
2080	20.88995
2085	21.57829
2090	22.21631
2095	22.79638
2100	23.3078