1990

6.5

1999

7.2

1992

6.8

6.4

2018

6.5

2001

6.8

2007

8.2

2023

6.8

1993

6.1

2003

6.9

1991

5.7

1926

5.6

6.2

2007

6.3

2003

6.7

2012

6.1

1982

5.9

1992

6.9

5.8