Geographical area | % Cp+ | Reference |
|---|
North Italy
| 87% | [11] |
Korea
| 79% | [13] |
Austria
| 54% | [14] |
Germany
| 47% | [15] |
East coast USA
| 35% | [15] |
Netherlands
| 29%-0% | [15] &[24] |
Central Italy
| 13%-16% | [15] &[17] |
UK
| 12% | [15] |
Southern China
| 11% | [15] |
Cuba
| 10% | [16] |
Africa
| 0% | [17] |
Rochester (New York)
| 0% | [18] |
Southern Florida
| 0% | [19] &[21] |
North China
| 0% | [20] |
Japan
| 0% | [22] &[23] |
