1982

7.1

1997

7.2

1996

6.9

2019

8.0

2013

7.9

1993

6.6

1998

7.3

2021

7.2

2023

7.8

2021

6.9

2006

6.9

1999

6.5

1996

7.3

1986

0.0

1967

7.7

2007

6.6

2014

6.7

2021

6.7

1972

6.5

1976

0.0