It has declined about 50,000
It has declined about 50,000
None.
23 centuries.
Depends on what period: for the later, "high" Middle Ages (11th-13th centuries), 300-400 million; a few centuries earlier, not much over 200m. .
Kwakiutl mask are from the northern part of Vancouver Island in BC Canada and are made for the most part from Red Cedar. Also used but not as much for masks is Yellow Cedar and Alder.
the fans offered 1billion and that was declined
According to the US Census Bureau, the city population of Chicago was 2,695,598 in April, 2010 and about 2,707,000 in late 2011.
Centuries
500 years
300
There is no easy answer to this question. The borders in Europe have moved so much over the centuries that the ethnics of a population can't really defined accurately. Most of the population of Luxembourg are from Celtic origin whether German French or Belgian. See link below for more information.
20 decades = 2 centuries or 20*10 = 200 years