Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Top 20 countries by publication.
| Country | Frequency |
|---|---|
| USA | 1431 |
| UK | 496 |
| Spain | 466 |
| Italy | 452 |
| The Netherlands | 407 |
| China | 389 |
| Canada | 352 |
| Germany | 306 |
| Republic of Korea | 271 |
| Australia | 237 |
| France | 220 |
| Brazil | 112 |
| Sweden | 106 |
| Turkey | 81 |
| Belgium | 80 |
| Denmark | 79 |
| Japan | 79 |
| Portugal | 74 |
| Switzerland | 73 |
| Poland | 64 |
