| Anno | Mese | Valore | Data | Anno di riferimento. |
|---|---|---|---|---|
| 2019 | DIC | 18,449 | 31/12/2019 | 2019 |
| 2020 | GEN | 18,587 | 31/01/2020 | 2020 |
| 2020 | FEB | 18,264 | 29/02/2020 | 2020 |
| 2020 | MAR | 17,047 | 31/03/2020 | 2020 |
| 2020 | APR | 17,590 | 30/04/2020 | 2020 |
| 2020 | MAG | 17,825 | 31/05/2020 | 2020 |
| 2020 | JUN | 18,067 | 30/06/2020 | 2020 |
| 2020 | LUG | 18,204 | 31/07/2020 | 2020 |
| 2020 | AGO | 18,408 | 31/08/2020 | 2020 |
| 2020 | SET | 18,372 | 30/09/2020 | 2020 |
| 2020 | OTT | 18,310 | 31/10/2020 | 2020 |