1964

5.6

1973

6.9

1976

6.7

2003

7.8

1978

0.0

2015

7.7

1979

6.8

2023

6.7

1984

7.2

1990

7.4

2001

7.6

1999

7.9

1951

5.0

2007

8.1

2021

0.0

2009

7.5

1991

6.1

2003

0.0

1980

5.5

1978

7.5

2017

7.7

1999

4.0

1977

6.3

2001

6.8