1979

7.3

1989

4.9

2007

6.0

2015

6.3

2000

7.3

1987

6.7

1972

7.1

1991

8.1

2012

5.8

1992

6.5

2023

6.1

2018

6.8

2010

5.1

1979

6.1

2013

6.1

2004

7.1

2003

6.4

2016

6.7

1976

5.2

2022

6.1