1990

6.9

1992

6.8

1996

7.7

2023

7.7

1995

8.2

2013

7.5

1990

7.2

1972

7.5

1964

7.4

1993

7.4

1998

7.9

2003

8.2

2011

7.1

2012

5.6

2017

7.1

2016

5.7

2016

7.3

1989

8.0

1974

7.2

1996

8.1