1979

6.4

1988

6.8

1999

8.0

2006

7.5

1990

7.2

2016

4.3

1988

4.8

2017

6.1

1960

8.1

2002

6.7

2001

7.3

1949

5.0

1989

6.6

2024

0.0

2005

5.7

2023

6.8

2024

0.0

2009

4.0

2023

5.9

1982

7.8