|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