Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
History of immigration to the United States
Table title:
Immigration summary since 1830
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Year </th><th colspan=1 rowspan=1 >  </th><th colspan=1 rowspan=1 > Year </th><th colspan=1 rowspan=1 >  </th><th colspan=1 rowspan=1 > Year </th><th colspan=1 rowspan=1 >  </th></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 1820 </td><td class="highlighted"  colspan=1 rowspan=1 > 8,385 </td><td colspan=1 rowspan=1 > 1885 </td><td colspan=1 rowspan=1 > 395,346 </td><td colspan=1 rowspan=1 > 1950 </td><td colspan=1 rowspan=1 > 249,187 </td></tr>
<tr> <td colspan=1 rowspan=1 > 1825 </td><td colspan=1 rowspan=1 > 10,199 </td><td colspan=1 rowspan=1 > 1890 </td><td colspan=1 rowspan=1 > 455,302 </td><td colspan=1 rowspan=1 > 1955 </td><td colspan=1 rowspan=1 > 237,790 </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 1830 </td><td class="highlighted"  colspan=1 rowspan=1 > 23,322 </td><td colspan=1 rowspan=1 > 1895 </td><td colspan=1 rowspan=1 > 258,536 </td><td colspan=1 rowspan=1 > 1960 </td><td colspan=1 rowspan=1 > 265,398 </td></tr>
<tr> <td colspan=1 rowspan=1 > 1835 </td><td colspan=1 rowspan=1 > 45,374 </td><td colspan=1 rowspan=1 > 1900 </td><td colspan=1 rowspan=1 > 448,572 </td><td colspan=1 rowspan=1 > 1965 </td><td colspan=1 rowspan=1 > 296,697 </td></tr>
<tr> <td colspan=1 rowspan=1 > 1840 </td><td colspan=1 rowspan=1 > 84,066 </td><td colspan=1 rowspan=1 > 1905 </td><td colspan=1 rowspan=1 > 1,026,499 </td><td colspan=1 rowspan=1 > 1970 </td><td colspan=1 rowspan=1 > 373,326 </td></tr>
<tr> <td colspan=1 rowspan=1 > 1845 </td><td colspan=1 rowspan=1 > 114,371 </td><td colspan=1 rowspan=1 > 1910 </td><td colspan=1 rowspan=1 > 1,041,570 </td><td colspan=1 rowspan=1 > 1975 </td><td colspan=1 rowspan=1 > 385,378 </td></tr>
<tr> <td colspan=1 rowspan=1 > 1850 </td><td colspan=1 rowspan=1 > 369,980 </td><td colspan=1 rowspan=1 > 1915 </td><td colspan=1 rowspan=1 > 326,700 </td><td colspan=1 rowspan=1 > 1980 </td><td colspan=1 rowspan=1 > 524,295 </td></tr>
<tr> <td colspan=1 rowspan=1 > 1855 </td><td colspan=1 rowspan=1 > 200,877 </td><td colspan=1 rowspan=1 > 1920 </td><td colspan=1 rowspan=1 > 430,001 </td><td colspan=1 rowspan=1 > 1985 </td><td colspan=1 rowspan=1 > 568,149 </td></tr>
<tr> <td colspan=1 rowspan=1 > 1860 </td><td colspan=1 rowspan=1 > 153,640 </td><td colspan=1 rowspan=1 > 1925 </td><td colspan=1 rowspan=1 > 294,314 </td><td colspan=1 rowspan=1 > 1990 </td><td colspan=1 rowspan=1 > 1,535,872 </td></tr>
<tr> <td colspan=1 rowspan=1 > 1865 </td><td colspan=1 rowspan=1 > 248,120 </td><td colspan=1 rowspan=1 > 1930 </td><td colspan=1 rowspan=1 > 241,700 </td><td colspan=1 rowspan=1 > 1995 </td><td colspan=1 rowspan=1 > 720,177 </td></tr>
<tr> <td colspan=1 rowspan=1 > 1870 </td><td colspan=1 rowspan=1 > 387,203 </td><td colspan=1 rowspan=1 > 1935 </td><td colspan=1 rowspan=1 > 34,956 </td><td colspan=1 rowspan=1 > 2000 </td><td colspan=1 rowspan=1 > 841,002 </td></tr>
<tr> <td colspan=1 rowspan=1 > 1875 </td><td colspan=1 rowspan=1 > 227,498 </td><td colspan=1 rowspan=1 > 1940 </td><td colspan=1 rowspan=1 > 70,756 </td><td colspan=1 rowspan=1 > 2005 </td><td colspan=1 rowspan=1 > 1,122,257 </td></tr>
<tr> <td colspan=1 rowspan=1 > 1880 </td><td colspan=1 rowspan=1 > 457,257 </td><td colspan=1 rowspan=1 > 1945 </td><td colspan=1 rowspan=1 > 38,119 </td><td colspan=1 rowspan=1 > 2010 </td><td colspan=1 rowspan=1 > 1,042,625 </td></tr>
</table>
Question:
How did total immigration change from 1820 to 1830?
Answer:
In 1820, immigration totaled to 8,385, with total immigration gradually increasing to 23,322 by 1830.