Question: When did an administrative territorial entity with the capital Concord (capital of Merrimack County) reach the population of 146,849 ?
Choices:
1970-04-01
1885-12-01
1986-03-24
2012-09-05
2011-12-31
1828
1993-10-01
1950-04-01
2013-07-01
1631