2003

7.1

1990

6.1

2019

7.3

1988

7.6

1986

5.8

2002

7.4

2006

6.8

1978

7.4

2019

7.7

2013

6.1

2010

6.3

1993

7.3

1970

6.0

2009

6.0

2011

6.6

1935

7.5

1965

7.4

1974

7.0

2015

6.7

2015

5.9