1999

5.1

1996

5.8

2003

8.7

1993

5.8

2006

5.6

2011

6.8

1983

6.5

1996

6.2

1965

6.7

1990

6.1

1996

6.7

1979

7.3

2014

7.0

1962

7.7

2019

4.4

1976

7.5

2009

7.6

2023

5.8

2023

7.7

2004

8.0