1968

8.1

1987

6.8

2007

7.0

1997

7.6

1996

4.7

1964

6.3

1990

5.0

2018

5.3

2024

6.7

1989

4.8

1984

6.6

1979

7.0

1998

6.2

1969

6.2

1969

5.9

2009

7.4

2018

5.0

1980

6.5

2016

5.3

1983

4.8