Here is government revenue as percentage of GDP mapped for 2017 (data source: International Monetary Fund),
European countries have most of the highest numbers with Norway, France, Finland, Denmark and Belgium all having government revenue over 50% of GDP.
And here is the data set, G20 countries are highlighted in bold,
Afghanistan 24.46%
Albania 27.49%
Algeria 29.89%
Angola 16.46%
Antigua and Barbuda 19.86%
Argentina 34.07%
Armenia 21.2%
Australia 34.87%
Austria 48.83%
Azerbaijan 36.99%
Bahrain 18.53%
Bangladesh 10.22%
Barbados 34.63%
Belarus 41.71%
Belgium 51.09%
Belize 29.24%
Benin 18.67%
Bhutan 30.1%
Bolivia 31.71%
Bosnia and Herzegovina 43.28%
Botswana 32.69%
Brazil 30.12%
Brunei Darussalam 19.53%
Bulgaria 34.04%
Burkina Faso 21.69%
Burundi 14.02%
Cabo Verde 28.36%
Cambodia 19.5%
Cameroon 14.93%
Canada 39.32%
Central African Republic 12.92%
Chad 14.1%
Chile 22.63%
China 27.57%
Colombia 25.63%
Comoros 28.33%
Costa Rica 13.95%
Côte d’Ivoire 19.1%
Croatia 47.03%
Cyprus 40.37%
Czech Republic 40.59%
Democratic Republic of the Congo 10.4%
Denmark 52.08%
Djibouti 33.56%
Dominica 51.07%
Dominican Republic 15.12%
Ecuador 32%
Egypt 21.33%
El Salvador 19.5%
Equatorial Guinea 19.76%
Eritrea 14.74%
Estonia 40.12%
Ethiopia 14.9%
Fiji 28.12%
Finland 52.66%
France 53.87%
FYR Macedonia 28.95%
Gabon 17.36%
Georgia 29.09%
Germany 45.19%
Ghana 17.49%
Greece 48.84%
Grenada 25.87%
Guatemala 10.62%
Guinea 16.83%
Guinea-Bissau 17.32%
Guyana 29.68%
Haiti 17.68%
Honduras 27.38%
Hong Kong SAR 22.63%
Hungary 47.75%
Iceland 43.09%
India 20.85%
Indonesia 13.98%
Iraq 32.88%
Ireland 25.32%
Islamic Republic of Iran 15.65%
Israel 38.07%
Italy 46.63%
Jamaica 29.31%
Japan 33.23%
Jordan 27.88%
Kazakhstan 18.6%
Kenya 18.7%
Kiribati 121.87%
Korea (Republic of) 23.02%
Kosovo 26.18%
Kuwait 54.34%
Kyrgyz Republic 37.79%
Lao P.D.R. 17.02%
Latvia 37.33%
Lebanon 22.1%
Lesotho 39.79%
Liberia 30.56%
Libya 47.11%
Lithuania 33.76%
Luxembourg 43.22%
Macao SAR 29.87%
Madagascar 15%
Malawi 25.53%
Malaysia 19.62%
Maldives 28.31%
Mali 20.11%
Malta 39.48%
Marshall Islands 70.79%
Mauritania 27.04%
Mauritius 23.98%
Mexico 24.82%
Micronesia 69.17%
Moldova 35.69%
Mongolia 29.16%
Montenegro 41.03%
Morocco 26.13%
Mozambique 26.63%
Myanmar 18.23%
Namibia 33.64%
Nauru 110.07%
Nepal 26.33%
Netherlands 43.88%
New Zealand 34.12%
Nicaragua 25.46%
Niger 21.3%
Nigeria 5.97%
Norway 54.11%
Oman 29.46%
Pakistan 15.68%
Palau 38.69%
Panama 20.75%
Papua New Guinea 13.95%
Paraguay 26.07%
Peru 18.22%
Philippines 19.6%
Poland 39.78%
Portugal 43.12%
Puerto Rico 20.65%
Qatar 30.71%
Republic of Congo 23.09%
Romania 28.01%
Russia 33.28%
Rwanda 22.86%
Samoa 34.87%
San Marino 21.14%
São Tomé and Príncipe 30.59%
Saudi Arabia 24.41%
Senegal 24.12%
Serbia 42.64%
Seychelles 40.17%
Sierra Leone 15.14%
Singapore 23.34%
Slovak Republic 39.38%
Slovenia 38.82%
Solomon Islands 41.18%
Somalia 3.37%
South Africa 28.37%
South Sudan 40.07%
Spain 38.22%
Sri Lanka 13.84%
St. Kitts and Nevis 30.34%
St. Lucia 23.84%
St. Vincent and the Grenadines 28.09%
Sudan 8.54%
Suriname 18.16%
Swaziland 26.46%
Sweden 49.27%
Switzerland 33.53%
Taiwan Province of China 15.74%
Tajikistan 29.09%
Tanzania 15.88%
Thailand 21.1%
The Bahamas 18%
The Gambia 30.36%
Timor-Leste 42.8%
Togo 20.7%
Tonga 49.12%
Trinidad and Tobago 23.34%
Tunisia 24.2%
Turkey 31.48%
Turkmenistan 14.89%
Tuvalu 119.14%
Uganda 15.76%
Ukraine 40.14%
United Arab Emirates 30.27%
United Kingdom 36.39%
United States 31.09%
Uruguay 29.55%
Uzbekistan 31.61%
Vanuatu 31.49%
Venezuela 9.03%
Vietnam 23.5%
Yemen 6.61%
Zambia 17.89%
Zimbabwe 22.54%