1997no value given67.870.973.2 1998no value given18.726.636.9 1999no value given2031.139.7 200034.818.128.537.1 2001no value given50.858.765.4 2002no value given19.930.237 200331.922.235.554.8 200435.927.436.646.1 2005no value given56.462.166.7 200634.826.13441.9 200737.226.536.545.3 200833.425.433.741.1 2009no value given38.441.243.4 20106249.360.469.5 201139.330.339.948.6 201232.925.429.435.5 2013no value given27.332.135.4 201437.226.633.639 201564.644.561.273.1 201633.126.232.443.2