Country

2022 cluster

2021 cluster

2020 cluster

2019 cluster

2018 cluster

Albania

1

1

1

1

1

Bulgaria

2

2

2

2

2

Bosnia and Herzegovina

2

2

2

2

2

Belarus

3

3

3

3

3

The Czech Republic

2

2

2

2

2

Estonia

1

1

1

1

1

Georgia

1

1

1

1

1

Croatia

3

3

3

3

3

Hungary

3

3

3

3

3

Lithuania

1

1

1

1

1

Latvia

2

2

2

2

2

Moldova

1

1

1

1

1

North Macedonia

3

3

3

3

3

Montenegro

3

3

3

3

3

Poland

1

1

1

1

1

Romania

1

1

1

1

1

Russian federation

2

2

2

2

2

Serbia

1

1

1

1

1

Slovakia

2

2

2

2

2

Slovenia

3

3

3

3

3

Ukraine

3

3

3

3

3