2019

6.2

2018

5.8

2014

4.8

2016

5.9

2018

5.0

1939

7.9

1985

6.0

1964

6.7

1959

7.1

2000

6.1

1967

6.4

2014

6.9

2002

6.4

2020

6.5

1990

7.0

1999

7.3

1990

7.5

1993

7.8

1996

7.6

1985

7.2