Year	Percent
1950	12.43652
1955	12.36678
1960	13.89939
1965	13.87629
1970	13.70418
1975	13.52938
1980	13.77833
1985	13.64105
1990	13.49816
1995	12.50038
2000	11.38243
2005	10.72876
2010	10.32071
2015	9.98653
2020	9.88359
2025	9.39454
2030	8.86389
2035	8.36935
2040	7.9774
2045	7.68277
2050	7.41477
2055	7.12887
2060	6.8471
2065	6.58874
2070	6.38771
2075	6.23123
2080	6.09004
2085	5.96387
2090	5.83899
2095	5.72834
2100	5.64067