1996

6.6

2003

7.8

2002

7.1

1990

7.8

2004

7.3

1996

8.0

1989

7.4

1984

7.2

2007

6.7

1976

7.0

2019

8.1

1999

7.6

2023

10.0

2017

7.4

10.0

1964

6.1

1975

7.5

1996

7.3

1993

6.7

2005

7.0