1996

6.5

2003

7.3

2015

6.1

1966

6.2

2010

6.6

2005

5.2

2017

6.9

1988

6.5

1990

6.1

1982

6.7

1969

6.6

1985

7.2

2019

7.7

1985

6.7

1999

4.6

2001

7.0

2023

7.6

2003

6.8

1991

6.2

2022

6.5