2019

4.1

1992

6.4

2000

6.6

2005

6.7

2013

3.2

2005

6.4

2003

5.4

2000

4.3

2001

7.2

1990

6.3

1998

6.4

1979

8.2

2004

5.9

2001

7.0

2007

5.2

1955

6.0

1977

7.3

1985

2.8

1986

8.0

2000

6.1