2020

7.2

1959

7.5

1998

7.3

1999

6.1

2000

5.3

1990

7.8

1975

7.2

2013

6.1

2009

9.5

2005

7.4

1995

6.7

2003

8.1

1994

7.3

1969

6.9

2006

6.6

1985

6.6

1948

4.9

1996

6.8

2002

7.1

2003

6.7