When the number of visas issued is higher than the number of winners, the visas issued are based on consulate posts (the place they take their interview) or foreign chargeability? The numbers of winners are definitely based on foreign chargeability. If the number of visas issued are based on consulate post then the differences could be other foreign chargeability. For example, in DV13 Malaysia even have foreign chargeability from Africa and Europe. So, different Asia countries could take their interview in Malaysia.
I attach a table with those cases. Here it is
https://docs.google.com/file/d/0B2bWzexdyvIlM2xzTjlfckZfME0/edit
It has several sources combined together.
1. Winners published. That is the number of winners from official publications like
http://travel.state.gov/visa/bulletin/bulletin_6050.html I believe that is from the question on the electronic entry about the country of chargeability (or if it the same as country of birth - country of birth)
2. Born in the country. From immigration yearbook. Like
http://www.dhs.gov/yearbook-immigration-statistics-2012-legal-permanent-residents, table 10, "Persons Obtaining Legal Permanent Resident Status by Broad Class of Admission and Region and Country of Birth". As far as I understand, this is true country of birth of an immigrant. Not the country he or she was charged to or was chargeable to. Family members could all have their true country of birth each. This corresponds to the date of entry into US (not the date when the visa was issued), so there is overlapping of time periods. A person who got a visa in DV-N program, could enter US in the year N + 1
3. Country of last permanent residence. Like
http://www.dhs.gov/yearbook-immigration-statistics-2012-legal-permanent-residents, table 11, "Persons Obtaining Legal Permanent Resident Status by Broad Class of Admission and Region and Country of Last Residence". This corresponds to the date of entry into US (not the date when the visa was issued), so there is overlapping of time periods. A person who got a visa in DV-N program, could enter US in the year N + 1
4. Table like this
http://www.travel.state.gov/pdf/FY12AnnualReport-TableVII.pdf . This is to the country the visa number was actually charged (not the place of residence, not the place of birth - could be charged to spouse's country). "Immigrant Number Use for Visa Issuances and Adjustments of Status in the Diversity Immigrant Category"
5. For 2013 from CEAC data (per consulate, what usually means the place of last permanent residence).
Situation with 2013 Greece, Malaysia, Qatar and Singapore is explained by immigration yearbook tables. Much more immigrants live in the country than were born in it.
Macedonia is different, but the excess is small - 280 versus 262, that is 7% excess. Could be true marriages before immigrating.
Greece 2007-2009. Explanation could be different. There are a lot of greek residents not born in Greece. But the number of visas is for those who are charged to Greece. That could be because greek residents (not born in Greece) marry spouse
born in greece and change chargeability to Greece. That is why the excess is much higher (55 over 41 is 34% excess, but it is created by marriage of those winners who were not born in Greece, and there are a lot of them there
Albania 2003. The excess is very low - 1915 over 1898 - less than 1%. Possible true marriages.
Eritrea 2001. Could be an error is DOS tables (number 311 - visas issued). It contradicts to USCIS tables from immigration yearbook. Number 68 from immigration yearbook is much lower than number 311 from DOS tables. I question number 311 - that could be a mistake. Actually, I do not understand how number 311 could be achieved if it were not a mistake.