The state that Warsaw is in is at $25,000. They are the snobby Polish 5%
Actually if you exclude the city of Warsaw from the Mazovian Voivodeship, it would not be so rich.
On the other hand, with Warsaw included, Mazovian Voivodeship is the richest one.
Map of GDP per capita in 2010 by voivodeship (1st richest is Mazovian, 2nd - 4th are Greater Polish, Silesian and Lower Silesian):
http://www.stat.gov.pl/cps/rde/xbcr/gus/RN_pkb_rachunki_regionalne_2010_notatka.pdf
And here map of GDP per capita by voivodeship in 2009 in relation to European Union's average GDP per capita:
and in 2010 around $19,000
And in 2012 / 2013 over $22,000.
Getting there, in 2001 it was around $10,000
In 1989 / 1990 Poland had actually smaller GDP per capita than Belarus:
http://eastbook.eu/wp-content/uploads/2011/05/Koszty-zaniechania-reform-Bialorus-1991-2011.pdf
Now we are at 140% of Belarussian GDP per capita.
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Also Human Development Index of Belarus used to be higher (38th in the world in 1990, compared to 48th place of Poland).
Today the proportions are reversed - both HDI and GDP per capita in Poland are much higher than in Belarus.
This shows what preserving communism did to Belarus and how good was - despite all perturbations - transformation for Poland.