I don't think they have ever had a year where they reached the max , the year ends because they run out of time
Here are stats for entry on DV visas for 2010 ( latest year I could fine quickly)
Diversity. .
49,763
Principals, new arrivals (DV1). . .
26,454
Principals, adjustments (DV6). .
929
Spouses of DV1 or DV6, new arrivals (DV2). .
10,182
Spouses of DV1 or DV6, adjustments (DV7). .
375
Children of DV1 or DV6, new arrivals (DV3). .
11,556
Children of DV1 or DV6, adjustments (DV8). .
267
Even more interesting is the divion of the selectees using a formula that allows for expected failure / fraud rates. Note that Africa gets 50% of the selections because they expect so many to be fraud ( over 80% of the Nigerian entries are declared illegitimate )
For the 2012 Diversity Visa Lottery, the winning applicants were apportioned as follows:[8]
Region Winner allocation Country with highest number of winners Countries with high fraud level (percent of entries which are illegitimate and therefore disqualified during selection process)[citation needed]
Africa 50.00 % Nigeria Nigeria 82.71%, Egypt 65.6%, Ethiopia 64.06%, Ghana 56.65%, Sudan 54.7%, Niger 46.73%
Europe 30.98 % Ukraine Ukraine 71.49%, Belarus 61.63%, Latvia 52.28%, Uzbekistan 47.81%, Armenia 40.38%, Lithuania 40.04%
Asia 15.00 % Iran Bangladesh 96.71%
South and Central America and the Caribbean 2.00 % Venezuela Almost no fraudulent entries
Oceania 2.00 % Australia Fiji 16.32%
North America 0.02% Bahamas (only eligible country in North America) Almost no fraudulent entries