1990

4.7

2019

9.0

2025

7.0

2004

6.8

2000

7.6

1999

7.6

2004

7.4

2005

7.8

1996

7.5

1994

6.2

1971

8.2

1999

7.4

2014

5.1

2024

6.3

1998

6.8

1998

6.5

2002

6.3

1991

7.1

1964

7.1

1997

6.7