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

1

1

1

1

1

Estonia

2

2

2

2

2

Georgia

2

2

2

2

2

Croatia

2

2

2

2

2

Hungary

3

3

3

3

3

Lithuania

3

3

3

3

3

Latvia

2

2

2

2

2

Moldova

2

2

2

2

2

North Macedonia

3

3

3

3

3

Montenegro

2

2

2

2

2

Poland

1

1

1

1

1

Romania

1

1

1

1

1

Russian federation

3

3

3

3

3

Serbia

2

2

2

2

2

Slovakia

2

2

2

2

2

Slovenia

3

3

3

3

3

Ukraine

3

3

3

3

3