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:
| Player | Team | Matches | Overs | Runs | Wickets | Best | Econ | S/Rate | 4/inns | 5+/inns | Average |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Yasir Arafat | Kent Spitfires | 13.0 | 44.0 | 341.0 | 23.0 | 4/17 | 7.75 | 11.48 | 2.0 | 0.0 | 14.82 |
| Tyron Henderson | Middlesex Crusaders | 12.0 | 47.0 | 349.0 | 21.0 | 4/29 | 7.42 | 13.43 | 1.0 | 0.0 | 16.61 |
| Andrew Hall | Northamptonshire Steelbacks | 9.0 | 34.1 | 271.0 | 20.0 | 6/21 | 7.93 | 10.25 | 0.0 | 2.0 | 13.55 |
| Danish Kaneria | Essex Eagles | 12.0 | 45.1 | 276.0 | 20.0 | 4/22 | 6.11 | 13.55 | 1.0 | 0.0 | 13.8 |
| Tim Murtagh | Middlesex Crusaders | 13.0 | 50.0 | 400.0 | 20.0 | 3/15 | 8.0 | 15.0 | 0.0 | 0.0 | 20.0 |
| Johann Louw | Northamptonshire Steelbacks | 11.0 | 39.0 | 325.0 | 17.0 | 3/18 | 8.33 | 13.76 | 0.0 | 0.0 | 19.12 |
| James Tredwell | Kent Spitfires | 13.0 | 41.0 | 264.0 | 16.0 | 3/9 | 6.43 | 15.38 | 0.0 | 0.0 | 16.5 |
| Graham Napier | Essex Eagles | 12.0 | 40.1 | 282.0 | 16.0 | 4/10 | 7.02 | 15.06 | 1.0 | 0.0 | 17.62 |
| Ian Salisbury | Warwickshire Bears | 10.0 | 32.0 | 175.0 | 15.0 | 3/14 | 5.47 | 12.8 | 0.0 | 0.0 | 11.67 |
| Abdul Razzaq | Surrey Brown Caps | 9.0 | 32.0 | 232.0 | 15.0 | 4/17 | 7.25 | 12.8 | 1.0 | 0.0 | 15.47 |
Question:
How many 5+/inns have tyron henderson as the player, with wickets less than 21?
Answer:
0.0