2019

7.7

1999

7.2

2010

9.1

2002

8.4

2011

7.1

2011

7.6

1991

4.7

2004

7.9

1968

6.9

7.8

1956

7.1

2003

6.0

1940

8.1

1968

6.5

1994

5.7

1989

6.3

2018

5.9

2022

7.4

2001

7.4

2010

7.4