user: Question: How many election results in 2012 had a Cook PVI of D+16?
Columns: ['District', 'Location', 'Representative', 'Cook PVI', '2012 election results', 'Median household income (2011)']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['2nd', 'Marin County and the North Coast', 'Jared Huffman', 'D+20', '69.0%–27.0% Obama', '$56,576']
SQL:

assistant: SELECT COUNT("2012 election results") FROM "Table" WHERE "Cook PVI" = 'D+16';