2012

66.6

60.8

73.1

67.2

61.3

73.6

64.2

58.1

70.2

2013

67.7

62.2

73.5

68.2

62.4

74.1

65.6

59.5

70.3

2014

67.9

62.2

74.1

68.3

62.6

74.3

66.1

59.7

72.9

2015

68.0

62.4

74.1

68.4

62.6

74.4

66.4

61.2

70.7

2016

68.7

63.1

74.6

69.0

63.3

74.9

66.9

61.4

73.1