1999

6.0

2017

6.7

1993

6.9

1957

5.2

1993

5.0

2017

8.4

2006

8.0

2016

6.9

2015

4.2

2010

5.7

2004

8.1

2013

8.3

2021

7.5

1983

5.0

2015

6.1

1978

6.8

1987

4.3

1992

7.4

1995

7.4

2016

7.5