2006

6.3

1996

7.0

1970

3.8

2018

5.0

1993

7.3

1980

4.8

1995

7.0

2005

6.4

2005

5.7

2007

7.6

2021

6.3

2022

5.5

2023

7.7

1986

6.9

2013

5.6

1991

4.6

1938

5.4

1973

1.0

1973

0.0

2015

4.8