Year	Percent
1950	14.44781
1955	14.58876
1960	13.54733
1965	12.98956
1970	11.32272
1975	10.32011
1980	9.10481
1985	8.43372
1990	7.81725
1995	6.7901
2000	6.2561
2005	4.70905
2010	4.67716
2015	4.59168
2020	4.60893
2025	4.69807
2030	4.59289
2035	4.31983
2040	4.11501
2045	4.08634
2050	4.18666
2055	4.31891
2060	4.37425
2065	4.3221
2070	4.24833
2075	4.24636
2080	4.33343
2085	4.4547
2090	4.53371
2095	4.53514
2100	4.48533