1980199020002002200320042005200620072008200920102011201220132014
n/an/an/an/an/an/an/an/an/a5.5%6.1%6.5%5.6%n/a4.8%n/a
n/an/an/an/an/an/an/an/an/a11.4%10.2%10.7%11.0%n/a9.4%n/a
n/an/an/an/an/an/an/an/an/an/an/an/a56.3%n/a56.0%n/a
n/an/an/an/an/an/an/an/an/a41.7%34.7%25.8%27.8%n/a25.1%n/a
n/an/an/an/an/an/an/an/an/a44.8%43.4%42.3%41.7%n/a38.6%n/a
n/an/an/an/an/an/an/an/an/a87.8%86.3%86.6%73.3%n/a69.7%n/a
n/an/an/an/an/an/an/an/an/a15.2%15.2%14.9%15.3%n/a13.2%n/a
n/an/an/an/an/an/an/an/an/a9.6%10.9%8.8%11.9%n/a10.3%n/a
n/an/an/an/an/an/an/an/an/a6.6%7.7%8.2%7.5%n/a6.4%n/a
n/an/an/an/an/an/an/an/an/a17.5%18.1%19.1%19.9%n/a18.4%n/a
n/an/an/an/an/an/an/an/an/a10%10.5%11.0%11.7%n/a12.2%n/a
n/an/an/a27.6%28.8%28.9%28.8%26.7%26.1%26.4%26.8%26.4%26.8%26.5%25.4%25.3%
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