2001

6.1

1983

7.9

2007

6.8

1971

6.4

1972

6.2

2011

5.1

1979

7.3

2003

7.2

2002

8.4

1974

8.6

2021

6.2

1997

7.8

2021

7.6

1981

6.5

1989

6.4

2003

6.7

1964

7.3

2011

7.8

1998

7.8

2009

6.2