Table 1 Survey centers by country
Country | 2014 | 2018 | ||
|---|---|---|---|---|
N | % | N | % | |
United States | 57 | 62.0 | 49 | 68.0 |
United Kingdom | 9 | 10.0 | 1 | 1.4 |
Brazil | 5 | 6.0 | 2 | 2.8 |
Canada | 4 | 4.0 | 2 | 2.8 |
Australia | 2 | 2.0 | 1 | 1.4 |
Colombia | 2 | 2.0 | 0 | 0 |
Germany | 2 | 2.0 | 2 | 2.8 |
Italy | 2 | 2.0 | 1 | 1.4 |
Belgium | 1 | 1.0 | 0 | 0 |
Finland | 1 | 1.0 | 0 | 0 |
Hong Kong SAR | 1 | 1.0 | 1 | 1 |
Mexico | 1 | 1.0 | 0 | 0 |
Poland | 1 | 1.0 | 0 | 0 |
Spain | 1 | 1.0 | 0 | 0 |
Sweden | 1 | 1.0 | 0 | 0 |
Switzerland | 1 | 1.0 | 0 | 0 |
Thailand | 1 | 1.0 | 0 | 0 |
The Netherlands | 1 | 1.0 | 0 | 0 |
Argentina | 0 | 0 | 1 | 1.4 |
Czech Republic | 0 | 0 | 1 | 1.4 |
Egypt | 0 | 0 | 1 | 1.4 |
France | 0 | 0 | 1 | 1.4 |
Greece | 0 | 0 | 1 | 1.4 |
Hungary | 0 | 0 | 1 | 1.4 |
Japan | 0 | 0 | 1 | 1.4 |
Kuwait | 0 | 0 | 1 | 1.4 |
Lebanon | 0 | 0 | 1 | 1.4 |
New Zealand | 0 | 0 | 1 | 1.4 |
Norway | 0 | 0 | 1 | 1.4 |
Romania | 0 | 0 | 1 | 1.4 |
Saudi Arabia | 0 | 0 | 1 | 1.4 |