1997

6.1

1965

6.8

1967

6.5

1985

6.8

2003

7.1

1971

6.8

2003

6.0

1994

6.8

1962

6.9

1964

7.1

2004

7.1

1979

7.3

2019

7.7

2020

7.0

2015

6.3

2010

6.6

2021

7.2

2022

7.4

1952

7.0

2003

6.6