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:
| Transmitter | kW | BBCA | BBCB | D3&4 | SDN | ARQA | ARQB | Pol. | A.G. |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Allenheads | 0.002 | 27 | 21 | 24 | N/A | N/A | N/A | V | A K |
| Alston | 0.08 | 39 | 45 | 42 | N/A | N/A | N/A | V | B E K |
| Bellingham | 0.01 | 27 | 21 | 24 | N/A | N/A | N/A | V | A K |
| Blaydon Burn | 0.002 | 44 | 47 | 41 | N/A | N/A | N/A | V | B E K |
| Byrness | 0.01 | 27 | 21 | 24 | N/A | N/A | N/A | V | A K |
| Catton Beacon | 0.028 | 40 | 46 | 43 | N/A | N/A | N/A | V | B E K |
| Durham | 0.003 | 41 | 47 | 44 | N/A | N/A | N/A | V | B E K |
| Esh | 0.0024 | 39 | 45 | 42 | N/A | N/A | N/A | V | B E K |
| Felling | 0.002 | 40 | 43 | 46 | N/A | N/A | N/A | V | B E K |
| Fenham | 0.4 | 27 | 21+ | 24 | 25 | 22+ | 28 | V | A K |
| Haltwhistle | 0.4 | 59 | 55 | 62- | N/A | N/A | N/A | V | C/D E |
| Haydon Bridge | 0.02 | 44 | 41 | 47 | N/A | N/A | N/A | V | B E K |
| Hedleyhope | 0.004 | 41 | 47 | 44 | N/A | N/A | N/A | V | B E K |
| Humshaugh | 0.0118 | 39 | 45 | 42 | N/A | N/A | N/A | V | B E K |
| Ireshopeburn | 0.0022 | 55 | 59 | 50 | N/A | N/A | N/A | V | C/D E |
| Kielder | 0.0054 | 26 | 23 | 29 | N/A | N/A | N/A | V | A K |
| Morpeth | 0.0088 | 22 | 28 | 25 | N/A | N/A | N/A | V | A K |
| Newton | 0.4 | 26 | 23 | 29 | N/A | N/A | N/A | V | A K |
| Seaham | 0.059 | 44 | 47 | 46 | N/A | N/A | N/A | V | B E K |
| Shotleyfield | 0.04 | 22 | 28 | 25 | N/A | N/A | N/A | V | A K |
| Staithes | 0.002 | 52 | 51 | 48 | N/A | N/A | N/A | V | B C/D E |
| Sunderland | 0.006 | 52 | 51 | 48 | N/A | N/A | N/A | V | B C/D E |
| Wall | 0.0042 | 52 | 51 | 48 | N/A | N/A | N/A | H | B C/D E |
| Weardale | 0.2 | 44 | 41 | 47 | N/A | N/A | N/A | V | B E K |
| Whitaside | 0.0025 | 44 | 41 | 47 | N/A | N/A | N/A | V | B E K |
Question:
what is the total number of transmitters listed in the table?
Answer:
25