1982

5.9

2020

6.8

1988

7.3

2020

5.2

1998

5.4

1992

5.7

1984

7.1

2014

7.0

1975

7.5

1961

6.9

2019

6.8

2014

7.1

2012

9.7

6.7

2019

7.4

1926

5.6

2001

8.2

2002

6.0

1987

7.5

2019

7.6