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Reference Citation Analysis
| Rank | Countries/Territories | Count | Percent |
| 1 | United States | 7633 | 12.4% |
| 2 | China | 7455 | 12.1% |
| 3 | 6723 | 10.9% | |
| 4 | Italy | 5299 | 8.6% |
| 5 | Japan | 4540 | 7.4% |
| 6 | India | 2261 | 3.7% |
| 7 | Turkey | 2116 | 3.4% |
| 8 | Spain | 1822 | 3% |
| 9 | Germany | 1667 | 2.7% |
| 10 | United Kingdom | 1653 | 2.7% |
| 11 | South Korea | 1563 | 2.5% |
| 12 | Taiwan | 1560 | 2.5% |
| 13 | Greece | 1362 | 2.2% |
| 14 | Brazil | 1162 | 1.9% |
| 15 | Egypt | 1001 | 1.6% |
| 16 | Iran | 909 | 1.5% |
| 17 | Australia | 875 | 1.4% |
| 18 | France | 857 | 1.4% |
| 19 | Canada | 816 | 1.3% |
| 20 | Romania | 545 | 0.9% |
| 21 | Poland | 525 | 0.9% |
| 22 | Netherlands | 504 | 0.8% |
| 23 | Thailand | 479 | 0.8% |
| 24 | Mexico | 464 | 0.8% |
| 25 | Israel | 461 | 0.7% |
| 26 | Singapore | 365 | 0.6% |
| 27 | Saudi Arabia | 348 | 0.6% |
| 28 | Sweden | 337 | 0.5% |
| 29 | Afghanistan | 333 | 0.5% |
| 30 | Austria | 321 | 0.5% |
| 31 | Hungary | 314 | 0.5% |
| 32 | Portugal | 305 | 0.5% |
| 33 | Croatia | 290 | 0.5% |
| 34 | Russia | 257 | 0.4% |
| 35 | Belgium | 248 | 0.4% |
| 36 | Pakistan | 237 | 0.4% |
| 37 | Denmark | 232 | 0.4% |
| 38 | Switzerland | 222 | 0.4% |
| 39 | Argentina | 216 | 0.4% |
| 40 | Malaysia | 214 | 0.3% |
| 41 | Serbia | 200 | 0.3% |
| 42 | Norway | 142 | 0.2% |
| 43 | Finland | 142 | 0.2% |
| 44 | Indonesia | 129 | 0.2% |
| 45 | Slovenia | 129 | 0.2% |
| 46 | Ireland | 122 | 0.2% |
| 47 | United Arab Emirates | 109 | 0.2% |
| 48 | Chile | 108 | 0.2% |
| 49 | Czech Republic | 104 | 0.2% |
| 50 | Lebanon | 95 | 0.2% |
| 51 | Bulgaria | 90 | 0.1% |
| 52 | New Zealand | 89 | 0.1% |
| 53 | Nigeria | 87 | 0.1% |
| 54 | Tunisia | 85 | 0.1% |
| 55 | Lithuania | 84 | 0.1% |
| 56 | Jordan | 78 | 0.1% |
| 57 | Bangladesh | 78 | 0.1% |
| 58 | Iraq | 74 | 0.1% |
| 59 | Ukraine | 69 | 0.1% |
| 60 | South Africa | 68 | 0.1% |
| 61 | Qatar | 62 | 0.1% |
| 62 | Slovakia | 61 | 0.1% |
| 63 | Morocco | 57 | 0.1% |
| 64 | Colombia | 57 | 0.1% |
| 65 | Viet Nam | 48 | 0.1% |
| 66 | Cyprus | 45 | 0.1% |
| 67 | Ethiopia | 44 | 0.1% |
| 68 | Sri Lanka | 40 | 0.1% |
| 69 | Nepal | 40 | 0.1% |
| 70 | Peru | 38 | 0.1% |
| 71 | Oman | 33 | 0.1% |
| 72 | Kuwait | 33 | 0.1% |
| 73 | Cuba | 30 | 0% |
| 74 | Algeria | 30 | 0% |
| 75 | Kazakhstan | 28 | 0% |
| 76 | Philippines | 27 | 0% |
| 77 | Albania | 23 | 0% |
| 78 | Uruguay | 22 | 0% |
| 79 | Syria | 22 | 0% |
| 80 | Bosnia and Herzegovina | 18 | 0% |
| 81 | Belarus | 18 | 0% |
| 82 | Venezuela | 17 | 0% |
| 83 | Armenia | 16 | 0% |
| 84 | Jamaica | 16 | 0% |
| 85 | Bahrain | 16 | 0% |
| 86 | Sudan | 14 | 0% |
| 87 | Georgia | 14 | 0% |
| 88 | Trinidad and Tobago | 12 | 0% |
| 89 | Palestine | 12 | 0% |
| 90 | Cameroon | 12 | 0% |
| 91 | Estonia | 11 | 0% |
| 92 | Kosovo | 11 | 0% |
| 93 | Swaziland | 11 | 0% |
| 94 | Kenya | 10 | 0% |
| 95 | Uganda | 10 | 0% |
| 96 | Iceland | 9 | 0% |
| 97 | Ecuador | 9 | 0% |
| 98 | Brunei Darussalam | 9 | 0% |
| 99 | Latvia | 8 | 0% |
| 100 | Cambodia | 7 | 0% |
| 101 | Tanzania | 6 | 0% |
| 102 | Martinique | 6 | 0% |
| 103 | Saint Kitts and Nevis | 6 | 0% |
| 104 | Liberia | 5 | 0% |
| 105 | Guatemala | 5 | 0% |
| 106 | Mali | 5 | 0% |
| 107 | Ghana | 5 | 0% |
| 108 | Yemen | 4 | 0% |
| 109 | Moldova | 4 | 0% |
| 110 | Luxembourg | 4 | 0% |
| 111 | Angola | 4 | 0% |
| 112 | Myanmar | 4 | 0% |
| 113 | North Macedonia | 3 | 0% |
| 114 | Puerto Rico | 3 | 0% |
| 115 | Somalia | 3 | 0% |
| 116 | Congo | 3 | 0% |
| 117 | Libya | 3 | 0% |
| 118 | Zimbabwe | 2 | 0% |
| 119 | Guinea | 2 | 0% |
| 120 | Christmas Island | 2 | 0% |
| 121 | Senegal | 2 | 0% |
| 122 | Barbados | 2 | 0% |
| 123 | Uzbekistan | 2 | 0% |
| 124 | Malta | 2 | 0% |
| 125 | Malawi | 2 | 0% |
| 126 | Costa Rica | 2 | 0% |
| 127 | Zambia | 2 | 0% |
| 128 | Anguilla | 1 | 0% |
| 129 | Bahamas | 1 | 0% |
| 130 | Mongolia | 1 | 0% |
| 131 | El Salvador | 1 | 0% |
| 132 | Nicaragua | 1 | 0% |
| 133 | Montenegro | 1 | 0% |
| 134 | Mauritius | 1 | 0% |
| 135 | Bosnia | 1 | 0% |
| 136 | Madagascar | 1 | 0% |
| 137 | Greenland | 1 | 0% |
| 138 | Gambia | 1 | 0% |
| 139 | Rwanda | 1 | 0% |
| 140 | Azerbaijan | 1 | 0% |
| 141 | Kyrgyzstan | 1 | 0% |
| 142 | Gabon | 1 | 0% |
| 143 | International | 1 | 0% |
| 144 | Benin | 1 | 0% |
| 145 | Dominican Republic | 1 | 0% |
| 146 | Haiti | 1 | 0% |
| 147 | Maldives | 1 | 0% |
| 148 | New Caledonia | 1 | 0% |
| 149 | Tuvalu | 1 | 0% |
| 150 | Botswana | 1 | 0% |
| 151 | Fiji | 1 | 0% |
| 152 | Reunion | 1 | 0% |