Table 1.

Regions by level [7].

Level type	Regions
Level 1	Australia, Austria, Canada, China, Denmark, Germany, Hong Kong, Hungary, Israel, Japan, New Zealand, Norway, Saudi Arabia, Singapore, South Korea, Switzerland, Taiwan, The Netherlands, United Arab Emirates, Vietnam.
Level 2	Bahrain, Croatia, Cyprus, Estonia, Finland, Georgia, Greece, Iceland, Ireland, Kuwait, Latvia, Liechtenstein, Lithuania, Luxembourg, Malaysia, Oman, Poland, Qatar, Slovenia, Turkey.
Level 3	Albania, Algeria, Andorra, Argentina, Armenia, Azerbaijan, Bahamas, Bangladesh, Belarus, Belgium, Bosnia and Herzegovina, Brazil, Bulgaria, Cambodia, Cayman Islands, Chile, Czech Republic, Ecuador, Egypt, France, Gibraltar, Greenland, Honduras, India, Indonesia, Iran, Italy, Jordan, Kazakhstan, Laos, Lebanon, Malta, Mexico, Moldova, Monaco, Mongolia, Montenegro, Morocco, Myanmar, Panama, Paraguay, Peru, Philippines, Portugal, Romania, Russia, San Marino, Serbia, Slovak Republic, South Africa, Spain, Sri Lanka, Sweden, Thailand, Tunisia, Ukraine, United Kingdom, United States, Uruguay, Vatican City.
Level 4	Afghanistan, Angola, Antigua and Barbuda, Aruba, Barbados, Belize, Benin, Bermuda, Bermuda, Bhutan, Bolivia, Botswana, British Virgin Islands, Burkina Faso, Burundi, Cabo Verde, Cameroon, Central African Republic, Chad, Colombia, Comoros, Congo Rep., Costa Rica, Côte d’Ivoire, Cuba, Curaçao, Djibouti, Dominica, Dominican Republic, El Salvador, Equatorial Guinea, Eritrea, Ethiopia, Fiji, French Polynesia, Gabon, Gambia, Ghana, Grenada, Guam, Guatemala, Guinea, Guinea-Bissau, Guyana, Haiti, Iraq, Isle of Man, Jamaica, Kenya, Kyrgyzstan, Lesotho, Liberia, Libya, Madagascar, Malawi, Maldives, Mali, Mauritania, Mauritius, Micronesia Fed. Sts., Mozambique, Namibia, Nepal, New Caledonia, Nicaragua, Niger, Nigeria, North Korea, North Macedonia, Pakistan, Palau, Papua New Guinea, Rwanda, São Tomé and Principe, Senegal, Seychelles, Sierra Leone, Sint Maarten (Dutch part), Solomon Islands, Somalia, South Sudan, St. Kitts and Nevis, St. Lucia, St. Martin (French part), St. Vincent and Grenadines, Sudan, Suriname, Syrian Arab Republic, Tajikistan, Tanzania, Timor-Leste, Togo, Trinidad and Tobago, Turkmenistan, Uganda, Uzbekistan, Vanuatu, Venezuela RB, Yemen Rep., Zambia, Zimbabwe.