Year	Percent
1950	12.14379
1955	12.52312
1960	12.44187
1965	11.17382
1970	11.75162
1975	11.98464
1980	12.15469
1985	12.04645
1990	12.29071
1995	14.33761
2000	14.73423
2005	12.44394
2010	11.47036
2015	12.42385
2020	12.88375
2025	12.12233
2030	11.33862
2035	10.67883
2040	10.25668
2045	10.00103
2050	9.69761
2055	9.26392
2060	8.76711
2065	8.32747
2070	7.98575
2075	7.70764
2080	7.43067
2085	7.10972
2090	6.79312
2095	6.51459
2100	6.27765