You're welcome to see the full list of all countries and their average CPMs for Interstitial impressions that are available at Traforama.
All the countries are represented in alphabetical order from A to Z your convenience.

Average rates for Adult traffic:
-A
Afghanistan $0.13
Albania $0.93
Algeria $0.68
American Samoa $0.18
Andorra $0.59
Angola $0.85
Anguilla $0.38
Antigua and Barbuda $0.35
Argentina $0.67
Armenia $0.64
Aruba $0.45
Australia $2.38
Austria $1.76
Azerbaijan $0.62
-B
Bahamas $0.75
Bahrain $0.56
Bangladesh $0.62
Barbados $0.56
Belarus $0.77
Belgium $1.25
Belize $0.29
Benin $0.42
Bermuda $0.43
Bhutan $0.20
Bolivia $0.75
Bonaire $0.13
Bosnia and Herzegovina $0.60
Botswana $0.11
Brazil $0.55
British Indian Ocean Territory $0.11
British Virgin Islands $0.63
Brunei $0.60
Bulgaria $2.57
Burkina Faso $0.11
Burundi $0.11
-C
Cambodia $0.52
Cameroon $0.39
Canada $1.30
Cape Verde $0.35
Cayman Islands $0.13
Central African Republic $0.20
Chad $0.11
Chile $0.78
China $1.18
Colombia $0.74
Comoros $0.68
Congo $0.27
Cook Islands $0.40
Costa Rica $1.04
Croatia $0.62
Cuba $0.13
Curaçao $0.48
Cyprus $0.74
Czech Republic $1.04
-D
Denmark $1.30
Djibouti $0.15
Dominica $0.45
Dominican Republic $0.55
-E
East Timor $0.11
Ecuador $1.05
Egypt $0.66
El Salvador $0.60
Equatorial Guinea $0.14
Estonia $0.82
Ethiopia $0.56
-F
Falkland Islands $0.67
Faroe Islands $0.40
Federated States of Micronesia $0.11
Fiji $0.65
Finland $1.26
France $1.30
French Guiana $2.48
French Polynesia $0.72
-G
Gabon $0.30
Gambia $0.38
Georgia $0.62
Germany $1.22
Ghana $0.26
Gibraltar $0.74
Greece $0.76
Greenland $0.40
Grenada $0.16
Guadeloupe $2.31
Guam $0.26
Guatemala $0.53
Guernsey $0.51
Guinea $0.22
Guinea-Bissau $0.13
Guyana $0.59
-H
Haiti $0.69
Hashemite Kingdom of Jordan $0.64
Honduras $0.94
Hong Kong $1.50
Hungary $1.01
-I
Iceland $0.87
India $0.85
Indonesia $0.70
Iran $0.10
Iraq $0.86
Ireland $1.21
Isle of Man $0.48
Israel $1.21
Italy $1.36
Ivory Coast $0.21
-J
Jamaica $0.61
Japan $1.15
Jersey $0.53
-K
Kazakhstan $0.64
Kenya $0.77
Kosovo $0.21
Kuwait $0.36
Kyrgyzstan $0.55
-L
Laos $0.61
Latvia $0.64
Lebanon $0.64
Lesotho $0.13
Liberia $0.31
Libya $0.27
Liechtenstein $0.73
Lithuania $0.83
Luxembourg $1.55
-M
Macao $1.32
Macedonia $0.51
Madagascar $0.53
Malawi $0.11
Malaysia $0.55
Maldives $0.40
Mali $0.23
Malta $0.73
Marshall Islands $0.47
Martinique $2.71
Mauritania $0.18
Mauritius $0.68
Mayotte $2.56
Mexico $0.97
Monaco $0.11
Mongolia $0.49
Montenegro $0.66
Morocco $0.54
Mozambique $0.22
Myanmar [Burma] $0.26
-N
Namibia $0.62
Nepal $0.52
Netherlands $1.72
New Caledonia $0.50
New Zealand $1.43
Nicaragua $0.70
Niger $0.15
Nigeria $0.78
Northern Mariana Islands $0.29
Norway $1.33
-O
Oman $0.11
-P
Pakistan $0.84
Palau $0.21
Palestine $0.24
Panama $0.63
Papua New Guinea $0.11
Paraguay $0.60
Peru $0.96
Philippines $0.57
Poland $0.78
Portugal $0.98
Puerto Rico $0.83
-Q
Qatar $0.71
-R
Republic of Korea $0.46
Republic of Moldova $0.57
Republic of the Congo $0.14
Réunion $2.68
Romania $0.74
Russia $0.59
Rwanda $0.27
-S
Saint Helena $0.60
Saint Kitts and Nevis $0.54
Saint Lucia $0.37
Saint Martin $0.36
Saint Pierre and Miquelon $0.10
Saint Vincent and the Grenadines $0.29
Saint-Barthélemy $0.19
Samoa $0.10
San Marino $0.49
Saudi Arabia $0.66
Scotland $0.78
Senegal $0.51
Serbia $0.64
Seychelles $0.29
Sierra Leone $0.47
Singapore $0.90
Sint Maarten $0.45
Slovak Republic $0.93
Slovenia $0.64
Solomon Islands $0.20
Somalia $0.15
South Africa $0.80
South Sudan $0.11
Spain $1.60
Sri Lanka $0.50
Sudan $0.24
Suriname $0.47
Swaziland $0.11
Sweden $1.38
Switzerland $1.04
Syria $0.19
-T
Taiwan $0.89
Tajikistan $0.21
Tanzania $0.49
Thailand $0.52
Togo $0.55
Tonga $0.11
Trinidad and Tobago $0.56
Tunisia $0.52
Turkey $1.04
Turkmenistan $0.11
Turks and Caicos Islands $0.12
-U
U.S. Virgin Islands $0.51
Uganda $0.48
Ukraine $0.99
United Arab Emirates $0.63
United Kingdom $1.27
United States $1.92
Unknown $1.18
Uruguay $0.81
Uzbekistan $0.67
-V
Vanuatu $0.87
Venezuela $0.51
Vietnam $0.63
-Y
Yemen $0.11
-Z
Zambia $0.55
Zimbabwe $0.39
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