1989

7.3

2015

5.7

2020

6.5

2019

7.7

1965

8.0

2011

5.2

1964

6.8

2002

6.7

2018

5.0

2014

6.5

1987

6.8

1992

5.6

2000

2.7

1968

5.7

1990

6.1

2003

5.9

2012

7.8

1936

7.4

2019

6.9

1962

7.9