1991

0.0

1991

6.4

1998

6.3

1952

5.5

1980

6.8

1990

7.4

1999

7.9

2005

8.0

2007

8.1

2021

5.6

1996

5.9

1985

7.2

2017

8.1

1990

5.3

2002

8.6

1999

7.9

2006

6.0

2003

8.7