UFOs: Past, Present, and Future

7.567

/

1997

9

/

2009

4

/

2007

4

/

1911

3

/

2007

10

/

NaN

10

/

2014

5.5

/

1941

6

/

1974

6.3

/

2020

5

/

1998

5.8

/

1979

9

/

2023

6

/

2025

10

/

2025

7.2

/

2022

3.5

/

1998

10

/

2006

4

/

1937

5

/

2017