2017

5.6

2016

6.0

2008

6.6

1997

7.4

2007

6.7

2016

6.9

2019

7.6

2000

7.8

1977

0.0

2022

5.3

1996

7.9

1995

7.0

1983

5.8

1975

7.8

2002

7.2

0.0

1981

6.5

1991

5.0

2001

5.6

1990

6.9