The National Parks Project

6.3

/

2012

5.8

/

2007

6.2

/

2010

6.2

/

1994

4.5

/

1994

6.5

/

1996

6.7

/

1997

6

/

2000

6.4

/

2000

5.2

/

2013

7.1

/

2003

6.2

/

2014

7

/

2015

6.9

/

2009

5.9

/

2014

6.9

/

2017

7.7

/

2017

6.4

/

2015

5.75

/

2004

6.5

/

2015

6.653

/

2008

6.964

/

1985

7.4

/

2020

6.841

/

2023

6.644

/

2011

6.6

/

2024

7.4

/

2022

6.9

/

1968

6.949

/

2012

5.365

/

NaN

6.519

/

1993

6.5

/

2024

5.4

/

2023

7.1

/

NaN

6.6

/

1969

6.909

/

2024

5.1

/

2022

7

/

2021

6.159

/

1985

7.4

/

2024