51% (2017)

54% (2015)

45% (2016)

30% (2015)

46% (2016)

58% (2016)

52% (2012)

27% (2011)

45% (2013)

40% (2013)

53% (2014)

46% (2015)

42% (2012)

46% (2014)

32% (2013)

24% (2013)

43% (2016)

71% (2016)

48% (2012)

54% (2018)