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In 2006 alone, that swap meant the state lost $4.3 billion in taxpayer income. Add that up from 2001 through 2008, and it translates into annual net income losses somewhere near $30 billion. That trend is part of a larger march for New York: In 1950 the state accounted for 19% of all Americans, but by 2000 that number had fallen to 7%. The city's main saving grace has been its welcome mat for foreign immigrants, who have helped to replace some of those who flee.
The intelligence of those who saw the light and fled New York is handsomely exceeded by those who would never live there in the first place.