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:
| Year | Numer of Jamaicans\ngranted British\ncitizenship | Naturalisation\nby residence | Naturalisation\nby marriage | Registration\nof a minor child | Registration\nby other means |
| --- | --- | --- | --- | --- | --- |
| 1997 | 732 | 327 | 279 | 114 | 12 |
| 1998 | 1,370 | 571 | 564 | 221 | 14 |
| 1999 | 1,437 | 678 | 526 | 226 | 7 |
| 2000 | 1,882 | 927 | 664 | 281 | 10 |
| 2001 | 2,070 | 1,025 | 710 | 330 | 0 |
| 2002 | 2,025 | 1,035 | 705 | 285 | 0 |
| 2003 | 2,795 | 1,285 | 985 | 520 | 5 |
| 2004 | 3,180 | 1,415 | 1,060 | 640 | 65 |
| 2005 | 3,515 | 1,585 | 1,080 | 770 | 80 |
| 2006 | 2,525 | 1,110 | 710 | 655 | 55 |
| 2007 | 3,165 | 1,575 | 825 | 725 | 45 |
| 2008 | 2,715 | 1,275 | 695 | 700 | 45 |
Question:
most gain british citizenship in which manner?
Answer:
Naturalisation by residence