Year	Percent
1950	14.55409
1955	15.19208
1960	16.65587
1965	16.78146
1970	16.48684
1975	15.64476
1980	14.64645
1985	13.59908
1990	12.05482
1995	10.91967
2000	9.9215
2005	9.81344
2010	9.68644
2015	9.39326
2020	8.60135
2025	7.9663
2030	7.48691
2035	7.13737
2040	6.84132
2045	6.55106
2050	6.2764
2055	6.03007
2060	5.83553
2065	5.68765
2070	5.57573
2075	5.46299
2080	5.35539
2085	5.25764
2090	5.17506
2095	5.11582
2100	5.07396