2012

6.6

2014

8.5

1997

7.9

2023

7.0

2016

7.9

2019

7.8

2017

7.3

1994

8.7

1968

8.1

1976

8.1

1994

8.5

1989

8.3

2014

8.0

2015

7.6

2010

8.2

1994

8.5

2015

7.6

2000

7.4

1990

8.5

2007

7.6