1972

6.2

1999

6.4

1998

6.6

1995

4.9

1994

5.1

2010

5.3

1981

5.7

2015

7.0

1998

4.8

2016

7.5

2016

6.3

1970

5.8

2011

6.2

1975

5.3

2023

6.7

2011

6.3

2021

0.0

2026

0.0

2020

4.7

2021

6.4