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:
| Location | Coordinates | Type | Built | Details |
| --- | --- | --- | --- | --- |
| Lekhtusi Radar Station, Leningrad Oblast | 60°16′31.65″N 30°32′45.66″E﻿ / ﻿60.2754583°N 30.5460167°E | Voronezh-M | -2005 | Operational 2009, commissioned 2012. fills gap in coverage caused by loss of Skrunda-1 radar |
| Armavir Radar Station, Krasnodar | 44°55′30.38″N 40°59′2.02″E﻿ / ﻿44.9251056°N 40.9838944°E | Voronezh-DM | 2009 | Two radars at this site. One is currently operational and covers the south west, the second stage covers the south/south-east and could replace Gabala Radar Station in Azerbaijan. |
| Pionersky Radar Station at former Dunayevka air base near Pionersky, Kaliningrad | 54°51′26″N 20°10′56″E﻿ / ﻿54.857294°N 20.18235°E | Voronezh-DM | 2012 | Operational (in part) November 2011. Fully operational by 2014 |
| Mishelevka Radar Station, Irkutsk | 52°51′20.11″N 103°13′53.94″E﻿ / ﻿52.8555861°N 103.2316500°E | Voronezh-VP |  | Daryal-U radar demolished June 2011, new radar being tested in April 2012. |
| Pechora Radar Station, Komi | 65°12′36.59″N 57°17′43.38″E﻿ / ﻿65.2101639°N 57.2953833°E roughly | Voronezh-VP |  | Would replace current Daryal radar, claimed to start 2015 |
| Olenegorsk Radar Station, Murmansk | 68°6′59.63″N 33°55′8.69″E﻿ / ﻿68.1165639°N 33.9190806°E roughly | Voronezh-VP |  | Would replace Dnestr/Daugava radar at this site, claimed to start 2017 |
| Krasnoyarsk | May be the former radar site at Yeniseysk |  | 2013- |  |
| Altai Republic | near Barnaul |  | 2013- |  |
| Orenburg |  |  | 2013- | Started. |
Question:
how many voronezh radars were built before 2010?
Answer:
2