1991

6.2

1990

6.7

1993

5.5

2007

6.1

2007

6.5

2008

5.6

2017

6.6

1994

5.8

1956

7.7

2002

7.1

2016

8.2

2021

6.7

2023

7.2

2003

7.2

2014

6.7

2023

6.9

2026

0.0

1989

6.4

1975

5.9

1976

5.2