1996

6.4

2020

6.6

1970

2.8

1997

6.8

1999

8.5

2016

4.4

2004

7.4

1986

7.5

2006

6.4

2005

6.6

1991

8.3

1984

7.3

2019

4.2

2016

3.4

2007

6.2

1935

4.8

2019

7.8

2007

6.2

1925

6.7

2002

4.4