1964

9.0

1981

5.8

2006

7.1

1940

5.5

1971

7.0

2009

3.7

1989

6.0

2015

6.8

1973

4.7

2018

5.0

1958

5.8

2021

8.0

1999

5.5

1990

4.3

1993

5.0

2023

8.4

1965

7.0

2023

8.5