GTSPP Data Product Centre| Year & Month(yyyymm) | observing line | Number of observations |
|---|---|---|
| 201401 | PX37 | 82 |
| 201403 | PX37 | 87 |
| 201410 | PX37 | 87 |
| 201412 | PX37 | 84 |
| 201502 | PX37 | 90 |
| 201505 | PX37 | 82 |
| 201511 | PX37 | 106 |
| 201512 | PX37 | 95 |
| 201603 | PX37 | 98 |
| 201605 | PX37 | 100 |
| 201606 | PX37 | 1 |
| 201607 | PX37 | 94 |
| 201608 | PX37 | 76 |
| 201610 | PX37 | 80 |
| 201612 | PX37 | 80 |
| 201702 | PX37 | 99 |
| 201708 | PX37 | 99 |
| 201709 | PX37 | 82 |
| 201711 | PX37 | 84 |
| 201802 | PX37 | 83 |
| 201806 | PX37 | 85 |
| 201809 | PX37 | 88 |
| 201812 | PX37 | 83 |
| 201904 | PX37 | 85 |
| 201908 | PX37 | 83 |
| 202001 | PX37 | 64 |
| 202107 | PX37 | 24 |
| 202110 | PX37 | 25 |
| 202111 | PX37 | 26 |
| 202201 | PX37 | 22 |
| 202203 | PX37 | 32 |
| 202301 | PX37 | 76 |
| 202305 | PX37 | 89 |