Year | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016* |
---|---|---|---|---|---|---|---|---|---|
THE | 0.48 (0.36–0.60) | 0.50 (0.40–0.60) | 0.47 (0.37–0.57) | 0.48 (0.39–0.56) | 0.50 (0.43–0.57) | 0.50 (0.41–0.60) | 0.51 (0.40–0.61) | 0.46 (0.38–0.55) | – |
 Public | 0.47 (0.34–0.60) | 0.46 (0.34–0.58) | 0.47 (0.36–0.58) | 0.46 (0.37–0.56) | 0.47 (0.39–0.54) | 0.50 (0.41–0.59) | 0.48 (0.38–0.59) | 0.50 (0.41–0.59) | – |
  MSU | 0.49 (0.38–0.61) | 0.53 (0.44–0.62) | 0.47 (0.37–0.57) | 0.50 (0.42–0.57) | 0.53 (0.46–0.60) | 0.51 (0.42–0.60) | 0.54 (0.45–0.63) | 0.50 (0.35–0.65) | – |
  HIO | 0.31 (0.22–0.41) | 0.32 (0.23–0.41) | 0.32 (0.23–0.41) | 0.31 (0.23–0.39) | 0.31 (0.24–0.39) | 0.43 (0.34–0.53) | 0.29 (0.22–0.37) | 0.39 (0.32–0.46) | – |
  SSIO | 0.40 (0.30–0.49) | 0.38 (0.29–0.46) | 0.38 (0.30–0.46) | 0.39 (0.31–0.47) | 0.39 (0.32–0.47) | 0.41 (0.33–0.49) | 0.39 (0.31–0.47) | 0.39 (0.31–0.46) | – |
 Private | 0.52 (0.41–0.63) | 0.52 (0.42–0.62) | 0.52 (0.43–0.61) | 0.53 (0.45–0.61) | 0.52 (0.45–0.59) | 0.52 (0.44–0.60) | 0.51 (0.41–0.61) | 0.54 (0.45–0.63) | – |
  OOP | 0.48 (0.36–0.59) | 0.52 (0.43–0.61) | 0.44 (0.34–0.55) | 0.46 (0.37–0.55) | 0.50 (0.42–0.58) | 0.48 (0.39–0.58) | 0.52 (0.43–0.61) | 0.58 (0.34–0.81) | – |