1997

7.6

1994

6.0

1988

7.4

1971

8.1

1984

7.5

2018

6.8

2015

6.7

2014

6.8

1965

5.3

1999

7.3

2007

7.6

2013

7.9

1987

7.1

1996

7.1

2023

7.4

2003

7.8

1991

7.7

1983

6.3

1972

7.0

2023

5.6