An Alphabetical List of Countries Visited

I have no plans to visit all the countries of the world, but I thought it would be fun to see how close I've come to visiting a country that starts with each letter of the alphabet. Because there is some controversy about whether certain entities are countries, I'm using the United Nations list of Member States as my source. I'm also including their two Permanent Non-Member Observer States on my list of countries. There are no countries that start with W (Western Sahara is considered a Non-Self-Governing Territory) or X, so the maximum score is 24. Let's see how I do! 

Photo Source

A
Bahamas, Barbados, Belgium, Belize
Canada, Colombia, Costa Rica
Denmark
Estonia
Finland, France
Germany
H
Italy
J
K
L
Mexico, Monaco
Netherlands, Norway
O
Panama, Portugal
Q
R
Saint Lucia, Spain, Sweden
T
United Kingdom, United States
Vatican City
Y
Z

So my score is 13/24. I'm sad that it isn't 14/24; Luxembourg was supposed to be on that list. Someday. Or maybe I'll visit one of the 8 other L-countries eventually. 

Unless I missed one, my number of countries (as defined by the UN) is 25. Yet, my Visited Countries Map shows 34. That map includes entities like Aruba (Constituent Country) and Gibraltar (British Overseas Territory). I think Aruba is the only one that would make a difference to my alphabetical list.

What is your score out of 24? Let me know in the comments!