Country of previous citizenship 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011a 2012 2013 2014 2015 2016 2017 2018 2019 2020
Europe
Austria 7 9 3 1 2 6 6 3 8 7 4 20 14 9 7 10 5 8 7 6 11
Greece 6 6 3 1 1 1 2 2 2 2 1 7 15 1
Germany 36 44 15 20 27 25 22 28 33 35 25 55 67 35 59 29 15 38 50 59 45
Bulgaria 45 20 7 9 9 14 11 5 4 8 23 9 7 6 5 3 3 8 29 3 6
Czechia 41 53 15 28 106 142 14 60 75 60 76 16 9 7 17 7 5 2 6 6 5
Estonia 7 60 25 59 74 148 118 110 41 31 19 1 1 1
Croatia 100 45 17 413 22 50 148 26 34 25 26 61 50 22 27 15 14 12 17 12 1
Poland 38 41 13 20 17 26 10 10 14 13 9 27 18 11 45 15 18 22 19 21 11
Romania 2,988 5,644 2,238 3,415 3,605 6,890 4,303 6,052 5,535 3,805 3,939 15,658 14,392 6,999 6,200 2,605 2,874 1,757 2,123 1,822 1,058
Slovakia 135 158 80 129 107 161 206 116 106 97 97 414 307 202 310 208 282 136 223 260 234
EU27_2020 3,407 6,088 2,419 4,100 3,975 7,474 4,843 6,423 5,862 4,088 4,234 16,290 14,895 7,326 6,704 2,922 3,260 2,012 2,512 2,247 1,402
United Kingdom 3 1 1 1 2 4 6 8 7 4 3 11 14 22 52 35
Russia 207 202 66 91 87 162 111 7 156 119 111 168 151 97 170 131 119 75 89 93 74
Switzerland 2 5 3 1 2 6 5 3 1 7 4 6 3 6 3 2 6 2
Serbiab 1,079 1,254 470 343 533 949 357 757 758 672 721 1,678 1,330 647 410 158 144 93 105 88 52
Turkey 7 2 2 3 3 7 4 6 13 10 9 12 8 20 58 19 20 23 20 26 18
Ukraine 586 855 340 570 568 828 541 834 857 558 646 2,189 1,765 894 858 386 365 186 192 142 82
Other European 3 10 7 42 157 199 106 142 170 128 127 12 12 13 19 13 7 6 13 18 8
Together 5,294 8,417 3,304 5,152 5,324 9,621 5,968 8,174 7,820 5,576 5,852 20,356 18,176 9,008 8,229 3,635 3,932 2,412 2,955 2,672 1,673
Asia
Afghanistan 6 5 1 5 16 5 4 25 15 10 24 4 5 2 5 13 11 9 11 8 11
Iraq 15 4 3 3 4 6 6 5 3 8 3 6 4 5 5 8 4 7 6
Iran 9 4 1 3 7 10 7 11 6 18 14 7 14 11 16 10 21 10 11 21 13
Yemen 4 2 5 2 4 6 3 6 11 4 3 8 7 10 5 9 3 3 2
Jordan 4 9 1 5 1 5 1 3 6 2 2 1 3 2 18 7 2 2 6 3 4
Kazakhstan 7 10 3 1 3 8 8 5 6 6 3 3 3 5 6 8 3 5 3 2 2
China 3 3 5 4 3 16 15 31 29 20 27 15 3 7 13 12 15 14 12 4 5
Lebanon 7 3 5 1 2 5 3 3 6 2 1 1 3 8 3 1 3 5 4 1
Mongolia 3 8 8 1 6 11 14 10 4 14 16 18 9 8 20 18 13 19 28 12 10
Syria 17 12 5 13 7 13 13 22 17 11 10 7 11 10 57 21 11 21 15 13 5
Vietnam 14 17 5 11 10 53 40 53 95 39 75 38 29 15 67 39 36 46 87 100 62
Other Asian 12 25 3 17 11 34 27 22 32 29 16 36 23 29 49 50 49 41 54 48 27
Together 101 102 40 69 72 170 144 193 225 170 195 133 117 96 273 191 176 181 239 222 148
America
United States 1 1 1 2 2 3 4 12 11 9 2 17 13 9 25 13 17 10 17 25 25
Cuba 6 17 4 6 4 14 7 8 11 4 5 5 7 2 14 9 10 2 3 5 6
Other American 11 11 4 9 10 13 8 11 10 16 4 20 16 13 38 40 18 18 66 168 116
Together 18 29 9 17 16 30 19 31 32 29 11 42 36 24 77 62 45 30 86 198 147
Africa
Algeria 7 15 5 2 6 11 10 11 7 4 12 1 5 1 19 11 4 7 6 8 8
Egypt 2 3 1 2 2 1 4 2 5 3 2 6 9 81 93 101 119 191 103 124
Libya 3 5 1 1 2 4 2 2 1 1 1 1 4 2 3 1 2 5 2
Nigeria 4 6 3 3 1 9 5 9 2 4 5 3 9 5 15 13 11 7 5 7 7
Sudan 1 1 1 2 2 3 1 5 1 4 2 2 3 1 5 2 3
Other African 15 13 7 15 8 24 19 13 9 12 7 13 24 31 43 36 35 24 21 37 26
Together 32 42 16 22 20 49 40 42 27 27 28 21 49 49 164 158 155 163 225 162 170
Other and unknown 1 1 1 2 2 1 1 2 2 7 1 3 1 1
Total 5,446 8,590 3,369 5,261 5,432 9,870 6,172 8,442 8,104 5,802 6,086 20,554 18,379 9,178 8,745 4,048 4,315 2,787 3,508 3,255 2,139

Footnotes

a
Introduction of simplified naturalization procedure.
b
Including data of Montenegro till 2011.
.