1989

5.6

2003

6.3

1990

5.5

1992

5.3

2000

6.6

2007

7.3

2004

7.2

1949

7.7

2015

6.3

2002

6.6

1987

6.7

1952

6.7

1962

7.7

1995

6.3

2003

6.4

1985

8.1

1895

6.8

2011

6.9

2007

6.4

2003

6.3