2003

6.8

2005

7.2

2003

6.6

1987

7.1

1996

6.4

2000

7.8

1982

6.7

1990

6.2

1990

6.2

1983

7.2

1994

7.3

1989

6.6

1933

7.3

1972

7.5

1986

7.2

1989

5.9

1988

6.9

2020

4.2

2003

5.3

2002

6.4