Here is the country based stats for the Google Code Jam 2018 after Round 2.

https://docs.google.com/spreadsheets/d/e/2PACX-1vSYF-ONpBokyihEQbVfzG2HEatyeyHYtVUVWWxGdjguoJd2YoLlpjWNg509gq1L8AUDq7rzK701CNgt/pubhtml?gid=1034207289&single=true

Country Qualified China 199
Russia 101 Japan 99 United States 65 South Korea 52 Taiwan 42 Poland 34 India 26 Vietnam 24 Ukraine 23 Brazil 22 Canada 21 Hong Kong 16 Singapore 15 Belarus 13 Germany 13 Iran 13 Indonesia 12 Czech Republic 11 Egypt 10 Romania 10 Netherlands 9 UNKNOWN 8 Argentina 8 Australia 8 Georgia 8 Sweden 8 Thailand 8 Kazakhstan 7 United Kingdom 7 Bangladesh 6 Bulgaria 6 Latvia 6 France 5 Hungary 5 Slovakia 5 Croatia 4 Finland 4 Italy 4 Lithuania 4 Mexico 4 Switzerland 4 Cuba 3 Estonia 3 Jordan 3 Peru 3 Philippines 3 Serbia 3 Spain 3 Turkey 3 Armenia 2 Belgium 2 Greece 2 New Zealand 2 Portugal 2 Slovenia 2 Austria 1 Bosnia and Herzegovina 1 Denmark 1 Iceland 1 Ireland 1 Israel 1 Lebanon 1 Macau 1 Macedonia [FYROM] 1 Malaysia 1 Nepal 1 Norway 1 South Africa 1 Syria 1 Venezuela 1