1959

5.2

2009

6.5

2019

6.0

2001

6.7

1990

6.7

1988

5.6

2009

4.8

2002

5.0

1986

6.1

1993

7.0

1995

6.2

2006

5.6

2018

1.0

2003

5.3

2001

5.4

1972

6.2

1953

0.0

2020

6.7

1996

5.5

2024

6.5