1992

6.6

1998

6.3

1999

6.9

2003

4.9

2014

6.6

2025

7.5

2007

6.8

2006

5.8

2013

5.5

2007

5.6

2013

5.7

1962

4.0

1985

0.0

2008

7.3

1965

6.8

1954

7.1

2025

6.6

2017

6.2

1987

4.4

1936

6.5