2004

4.2

1961

7.7

2007

10.0

2020

6.8

2018

7.0

2017

6.0

2020

8.0

2021

9.7

1993

5.8

2008

4.5

1974

5.7

1949

6.2

1987

7.1

1989

9.3

1964

7.4

1983

6.5

2007

4.0

1994

6.0