2015

7.6

2010

5.2

1949

7.7

2003

6.0

2001

6.4

1994

4.5

2007

8.1

1990

6.9

1995

6.3

1953

7.1

1955

7.3

1989

7.3

1989

6.6

1987

6.3

1990

6.4

1998

6.9

1997

5.1

1953

6.4

1989

5.1

1964

7.0