2014

5.9

1964

7.1

1975

6.3

2007

6.1

2015

5.4

2019

6.5

2003

7.4

2002

6.6

1997

7.7

1994

6.2

1990

7.7

1961

7.6

1989

7.8

1980

6.6

1982

6.4

1988

7.5

1991

7.3

2006

5.8