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 | Edmonton\nHundred | Elthorne\nHundred | Gore\nHundred | Isleworth\nHundred | Ossulstone\nHundred\nHolborn\nDivision | Ossulstone\nHundred\nFinsbury\nDivision | Ossulstone\nHundred\nKensington\nDivision | Ossulstone\nHundred\nTower\nDivision | Spelthorne\nHundred | London City\nWithin\nthe Walls | London City\nWithout\nthe Walls | Inns of Court\nand\nChancery | Westminster\nCity and\nLiberty | Total |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1801 | 16,885 | 16,853 | 6,968 | 9,266 | 171,202 | 73,268 | 40,642 | 215,382 | 12,743 | 63,832 | 70,676 | 1,907 | 157,890 | 818,129 |
| 1811 | 20,577 | 19,929 | 8,738 | 10,669 | 214,946 | 92,538 | 54,550 | 272,966 | 14,409 | 55,484 | 70,489 | 1,796 | 166,438 | 953,774 |
| 1821 | 24,771 | 23,479 | 9,806 | 12,285 | 272,131 | 119,802 | 70,808 | 339,075 | 16,966 | 56,174 | 74,765 | 1,546 | 186,584 | 1,144,531 |
| 1831 | 26,930 | 26,976 | 11,315 | 13,568 | 341,981 | 151,409 | 87,961 | 427,090 | 19,204 | 55,778 | 73,442 | 1,271 | 206,116 | 1,358,130 |
| 1841 | 30,683 | 34,943 | 12,487 | 15,893 | 399,218 | 185,174 | 122,795 | 513,501 | 21,298 | 54,626 | 74,758 | 1,708 | 226,241 | 1,574,416 |
| 1851 | 32,109 | 35,828 | 12,956 | 18,463 | 480,942 | 239,788 | 169,317 | 641,918 | 22,107 | 54,702 | 79,096 | 1,398 | 241,450 | 1,886,576 |
| 1861 | 40,885 | 42,274 | 15,341 | 23,610 | 551,487 | 312,553 | 223,305 | 773,621 | 24,795 | 44,400 | 73,125 | 1,272 | 254,463 | 2,206,485 |
| 1871 | 57,332 | 46,996 | 21,291 | 30,463 | 604,891 | 381,702 | 350,688 | 902,056 | 33,069 | 28,093 | 50,733 | 1,138 | 246,592 | 2,539,765 |
| 1881 | 94,185 | 51,932 | 27,029 | 35,206 | 622,865 | 482,264 | 524,122 | 1,018,337 | 40,400 | 18,851 | 32,389 | 1,011 | 228,993 | 2,920,485 |
Question:
what is the difference between the elthorne hundred and the gore hundred in 1831?
Answer:
15661