2001

7.4

2023

6.3

2013

6.1

2007

7.1

1971

6.7

1993

6.2

2011

7.6

1999

7.2

2019

6.5

1973

7.4

1999

6.3

2015

7.8

1896

6.2

1982

5.8

2009

8.5

1996

5.7

1960

7.2

1951

7.2

1967

7.0

2013

6.1