Countries with missing data

✕  Albania –

✕  Belgium –

✕  Bulgaria –

✕  Croatia –

✕  France –

✕  Iceland –

✕  Ireland –

✕  Italy –

✕  Lithuania –

✕  Norway –

✕  Poland –

✕  Romania –

✕  Serbia –

✕  Spain –

✕  Sweden –

✕  United Kingdom –