2001

1.0

2005

5.7

1991

6.3

1999

7.1

2002

6.0

1993

7.2

1995

5.9

1992

7.4

1994

6.5

1994

7.6

2007

5.6

2009

5.0

2015

10.0

1950

7.0

2019

7.1

1992

5.8

1981

7.2

2024

5.0

1961

8.1

2014

8.0