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:
| County | Obama | Votes | Romney | Votes | Others | Votes | Total |
| --- | --- | --- | --- | --- | --- | --- | --- |
| Alameda | 78.7% | 469,684 | 18.1% | 108,182 | 3.2% | 19,027 | 596,893 |
| Alpine | 59.5% | 389 | 36.1% | 236 | 4.4% | 29 | 654 |
| Amador | 38.6% | 6,830 | 58.1% | 10,281 | 3.3% | 582 | 17,693 |
| Butte | 46.9% | 42,669 | 48.9% | 44,479 | 4.2% | 3,873 | 91,021 |
| Calaveras | 39.7% | 8,670 | 56.5% | 12,365 | 3.8% | 827 | 21,862 |
| Colusa | 38.3% | 2,314 | 59.6% | 3,601 | 2.1% | 130 | 6,045 |
| Contra Costa | 66.2% | 290,824 | 31.1% | 136,517 | 2.7% | 11,804 | 439,145 |
| Del Norte | 43.4% | 3,791 | 52.8% | 4,614 | 3.8% | 331 | 8,736 |
| El Dorado | 39.5% | 35,166 | 57.3% | 50,973 | 3.2% | 2,859 | 88,998 |
| Fresno | 49.7% | 129,129 | 47.9% | 124,490 | 1.8% | 6,078 | 259,697 |
| Glenn | 35.9% | 3,301 | 61.3% | 5,632 | 2.8% | 258 | 9,191 |
| Humboldt | 59.7% | 34,457 | 32.6% | 18,825 | 7.7% | 4,404 | 57,686 |
| Imperial | 65.2% | 25,136 | 33.2% | 12,776 | 1.6% | 620 | 38,532 |
| Inyo | 42.8% | 3,422 | 54.2% | 4,340 | 3.0% | 242 | 8,004 |
| Kern | 40.5% | 89,495 | 57.3% | 126,618 | 2.2% | 4,900 | 221,013 |
| Kings | 41.4% | 12,979 | 56.4% | 17,671 | 2.2% | 701 | 31,351 |
| Lake | 56.4% | 13,163 | 39.5% | 9,200 | 4.1% | 955 | 23,318 |
| Lassen | 28.5% | 3,053 | 68.0% | 7,296 | 3.5% | 376 | 10,725 |
| Los Angeles | 69.7% | 2,216,903 | 27.8% | 885,333 | 2.5% | 77,378 | 3,179,614 |
| Madera | 40.2% | 16,018 | 57.3% | 22,852 | 2.5% | 996 | 39,866 |
| Marin | 74.1% | 99,896 | 22.9% | 30,880 | 3.0% | 3,955 | 134,731 |
| Mariposa | 39.0% | 3,498 | 57.3% | 5,140 | 3.7% | 335 | 8,973 |
| Mendocino | 66.0% | 23,193 | 27.5% | 9,658 | 6.5% | 2,286 | 35,137 |
| Merced | 53.0% | 33,005 | 44.3% | 27,581 | 2.7% | 1,636 | 62,222 |
| Modoc | 27.7% | 1,113 | 69.1% | 2,779 | 3.2% | 130 | 4,022 |
| Mono | 52.9% | 2,733 | 44.2% | 2,285 | 2.9% | 150 | 5,168 |
| Monterey | 67.3% | 82,918 | 30.3% | 37,389 | 2.4% | 2,959 | 123,266 |
| Napa | 63.1% | 35,870 | 34.3% | 19,526 | 2.6% | 1,457 | 56,853 |
| Nevada | 47.7% | 24,663 | 48.4% | 24,986 | 3.9% | 2,026 | 51,675 |
| Orange | 45.6% | 512,440 | 51.9% | 582,332 | 2.5% | 27,892 | 1,122,664 |
| Placer | 38.9% | 66,818 | 58.2% | 99,921 | 2.9% | 4,972 | 171,711 |
| Plumas | 39.9% | 4,026 | 56.8% | 5,721 | 3.3% | 333 | 10,080 |
| Riverside | 49.8% | 329,063 | 48.2% | 318,127 | 2.0% | 13,425 | 660,615 |
| Sacramento | 58.1% | 300,503 | 39.1% | 202,514 | 2.8% | 14,565 | 517,582 |
| San Benito | 59.1% | 11,276 | 38.5% | 7,343 | 2.4% | 462 | 19,081 |
| San Bernardino | 52.6% | 305,109 | 45.2% | 262,358 | 2.2% | 13,136 | 580,603 |
| San Diego | 52.7% | 626,957 | 45.1% | 536,726 | 2.2% | 25,288 | 1,188,971 |
| San Francisco | 83.4% | 301,723 | 13.0% | 47,076 | 3.4% | 12,996 | 361,795 |
| San Joaquin | 55.6% | 114,121 | 41.9% | 86,071 | 2.5% | 5,172 | 205,364 |
| San Luis Obispo | 48.6% | 61,258 | 47.6% | 59,967 | 3.8% | 4,741 | 125,966 |
| San Mateo | 72.1% | 206,087 | 25.4% | 72,756 | 2.5% | 6,878 | 285,721 |
| Santa Barbara | 57.4% | 94,129 | 39.4% | 64,606 | 3.2% | 5,150 | 163,885 |
| Santa Clara | 70.2% | 450,818 | 27.2% | 174,843 | 2.6% | 16,290 | 641,951 |
| Santa Cruz | 75.4% | 90,805 | 20.0% | 24,047 | 4.6% | 5,533 | 120,385 |
| Shasta | 33.8% | 25,819 | 62.8% | 48,067 | 3.4% | 2,615 | 76,501 |
| Sierra | 36.3% | 652 | 58.7% | 1,056 | 5.0% | 90 | 1,798 |
| Siskiyou | 40.2% | 8,044 | 55.4% | 11,076 | 4.4% | 870 | 19,990 |
| Solano | 63.3% | 96,783 | 34.1% | 52,092 | 2.6% | 3,965 | 152,840 |
| Sonoma | 71.0% | 153,942 | 25.3% | 54,784 | 3.2% | 8,139 | 216,865 |
| Stanislaus | 49.9% | 77,724 | 47.1% | 73,459 | 3.0% | 4,633 | 155,816 |
| Sutter | 39.2% | 12,192 | 58.3% | 18,122 | 2.5% | 769 | 31,083 |
| Tehama | 34.4% | 7,934 | 61.8% | 14,235 | 3.8% | 874 | 23,043 |
| Trinity | 46.6% | 2,674 | 47.3% | 2,716 | 6.1% | 349 | 5,739 |
| Tulare | 41.2% | 41,752 | 56.2% | 56,956 | 2.6% | 2,571 | 101,279 |
| Tuolumne | 40.4% | 9,998 | 56.0% | 13,880 | 3.6% | 880 | 24,758 |
| Ventura | 52.2% | 170,929 | 45.1% | 147,958 | 2.7% | 8,825 | 327,712 |
| Yolo | 65.4% | 48,715 | 31.4% | 23,368 | 3.2% | 2,392 | 74,475 |
| Yuba | 39.3% | 7,711 | 57.4% | 11,275 | 3.3% | 660 | 19,646 |
Question:
how many counties had at least 75% of the votes for obama?
Answer:
3