2002

5.3

1972

6.2

1989

5.7

1985

6.5

2001

6.1

2006

5.9

1992

5.3

2019

6.6

1934

6.5

1994

6.4

1998

6.0

1989

6.1

1993

6.7

1976

7.2

2017

7.3

1990

6.1

1999

6.7

2000

6.8

2008

6.9

2003

7.0