1990

6.9

1987

7.5

1995

7.3

2007

7.4

2003

6.6

2007

6.3

1998

6.3

1999

5.3

1925

7.6

1991

6.3

1964

5.5

2004

6.7

2006

7.2

2018

6.1

1942

7.8

2017

5.2

2007

6.4

1962

8.0

1986

7.7

1986

7.6