Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Position | Club | Played | Points | Wins | Draws | Losses | Goals for | Goals against | Goal Difference |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1.0 | CD Málaga | 38.0 | 54+16 | 22.0 | 10.0 | 6.0 | 74.0 | 39.0 | 35.0 |
| 2.0 | Elche CF | 38.0 | 50+12 | 21.0 | 8.0 | 9.0 | 62.0 | 34.0 | 28.0 |
| 3.0 | Castilla CF 1 | 38.0 | 48+10 | 18.0 | 12.0 | 8.0 | 58.0 | 42.0 | 16.0 |
| 4.0 | Real Oviedo | 38.0 | 45+7 | 19.0 | 7.0 | 12.0 | 58.0 | 37.0 | 21.0 |
| 5.0 | Rayo Vallecano | 38.0 | 45+7 | 18.0 | 9.0 | 11.0 | 58.0 | 47.0 | 11.0 |
| 6.0 | UE Lleida | 38.0 | 42+4 | 15.0 | 12.0 | 11.0 | 53.0 | 37.0 | 16.0 |
| 7.0 | UE Figueres | 38.0 | 42+4 | 14.0 | 14.0 | 10.0 | 44.0 | 36.0 | 8.0 |
| 8.0 | Barcelona Atlètic | 38.0 | 41+3 | 14.0 | 13.0 | 11.0 | 52.0 | 47.0 | 5.0 |
| 9.0 | Xerez CD | 38.0 | 41+3 | 17.0 | 7.0 | 14.0 | 49.0 | 37.0 | 12.0 |
| 10.0 | Sestao | 38.0 | 37-1 | 15.0 | 7.0 | 16.0 | 42.0 | 45.0 | -3.0 |
| 11.0 | CD Castellón | 38.0 | 37-1 | 12.0 | 13.0 | 13.0 | 34.0 | 45.0 | -11.0 |
| 12.0 | CD Tenerife | 38.0 | 36-2 | 13.0 | 10.0 | 15.0 | 48.0 | 57.0 | -9.0 |
| 13.0 | Real Burgos | 38.0 | 34-4 | 11.0 | 12.0 | 15.0 | 34.0 | 50.0 | -16.0 |
| 14.0 | Racing de Santander | 38.0 | 33-5 | 11.0 | 11.0 | 16.0 | 35.0 | 47.0 | -12.0 |
| 15.0 | Recreativo de Huelva | 38.0 | 33-5 | 12.0 | 9.0 | 17.0 | 55.0 | 71.0 | -16.0 |
| 16.0 | Deportivo de La Coruña | 38.0 | 31-7 | 8.0 | 15.0 | 15.0 | 35.0 | 47.0 | -12.0 |
| 17.0 | Bilbao Athletic | 38.0 | 31-7 | 11.0 | 9.0 | 18.0 | 44.0 | 53.0 | -9.0 |
| 18.0 | Hércules CF | 38.0 | 29-9 | 10.0 | 9.0 | 19.0 | 46.0 | 56.0 | -10.0 |
| 19.0 | Granada CF | 38.0 | 27-11 | 8.0 | 11.0 | 19.0 | 36.0 | 46.0 | -10.0 |
| 20.0 | Cartagena FC | 38.0 | 24-14 | 8.0 | 8.0 | 22.0 | 35.0 | 79.0 | -44.0 |
Question:
Name the total number of goal difference when the position is more than 20
Answer:
0.0