2015

6.7

1995

5.2

1993

6.6

1985

7.2

1988

6.2

1985

6.1

2019

6.7

2000

6.6

2023

6.7

2021

6.1

2003

6.3

1940

6.2

2011

6.6

1980

6.4

1989

6.2

1955

6.3

1969

6.6

1988

7.3

2006

6.8

1988

6.5