Not Much Fits

Below are average adult heights by country. (The original studies and sources should be consulted for details on methodology and the exact populations measured, surveyed, or considered.)

Country/Region  
Average male height  
Average female height  
Sample population /
age range  
Methodology  
Year  
Source  

Argentina
174.5 cm (5′ 8.7″)
161.0 cm (5′ 3.4″)
19
Measured
1998-2001
[1]

Australia
174.8 cm (5′ 8.8″)
163.4 cm (5′ 3.6″)
18+
Measured
1995
[2]

Australia
178.4 cm (5′ 10.2″)
164.5 cm (5′ 4.8″)
18–24
Measured
1995
[2]

Austria
179.6 cm (5′ 10.7″)
167.1 cm (5′ 5.8″)
21-25
Self Reported
1997–2002
[3]

Azerbaijan
171.8 cm (5′ 7.6″)
165.4 cm (5′ 5.1″)
16+
Measured
2005
[4]

Bahrain
165.1 cm (5′ 5.0″)
154.2 cm (5′ 0.9″)
19+
Measured
2002
[5]

Belgium
179.5 cm (5′ 10.7″)
167.8 cm (5′ 6.1″)
21-25
Self Reported
1997–2002
[3]

Brazil
169.0 cm (5′ 6.5″)
158.0 cm (5′ 2.2″)
21–65
Measured
2003
[6][7]

Cameroon
170.6 cm (5′ 7.2″)
161.3 cm (5′ 3.7″)
Urban adults
Measured
2003
[8]

Canada
174.0 cm [...]

Experts say height is key in measuring society’s well-being
By MATT CRENSON
THE ASSOCIATED PRESS
NEW YORK — America used to be the tallest country in the world.
From the days of the Founding Fathers right on through the Industrial Revolution and two world wars, Americans literally towered over other nations.
But just as it has in so many other [...]

I’ve read alot of stuff about tall people being natural leaders. I’ve been looking around for some statistical proof of this.