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:
| Ethnicity | 1926 census | 1939 census | 1959 census | 1970 census | 1979 census | 1989 census | 2007 estimate |
| --- | --- | --- | --- | --- | --- | --- | --- |
| Ossetians | 60,351 (69.1%) | 72,266 (68.1%) | 63,698 (65.8%) | 66,073 (66.5%) | 65,077 (66.4%) | 65,200 (65.9%) | 47,000 (67.1%) |
| Georgians | 23,538 (26.9%) | 27,525 (25.9%) | 26,584 (27.5%) | 28,125 (28.3%) | 28,187 (28.8%) | 28,700 (29.0%) | 17,500 (25.0%) |
| Russians | 157 (0.2%) | 2,111 (2.0%) | 2,380 (2.5%) | 1,574 (1.6%) | 2,046 (2.1%) | 2,128 (2.1%) | 2,100 (3.0%) |
| Armenians | 1,374 (1.6%) | 1,537 (1.4%) | 1,555 (1.6%) | 1,254 (1.3%) | 953 (1.0%) | 871 (0.9%) | 900 (1.3%) |
| Jews | 1,739 (2.0%) | 1,979 (1.9%) | 1,723 (1.8%) | 1,485 (1.5%) | 654 (0.7%) | 648 (0.7%) | 650 (0.9%) |
| Others | 216 (0.2%) | 700 (0.7%) | 867 (0.9%) | 910 (0.9%) | 1,071 (1.1%) | 1,453 (1.5%) | 1,850 (2.6%) |
| Total | 87,375 | 106,118 | 96,807 | 99,421 | 97,988 | 99,000 | 70,000 |
Question:
how many ethnicity is there?
Answer:
6