Here is the table released by Washington State OSPI.
OSPI would like to pretend that only the "confirmed refusals" opted out. But the reality is that many parents refused by keeping their kids home on the days of the test. The real total is the enrollment minus those who took the test.
In the past year, both the Washington State Democratic Party and Washington State Republican Party have passed resolutions by overwhelming margins opposing Common Core and the SBAC test. Tens of thousands of teachers have staged walkouts in more than 60 school districts across Washington state. Now 60,000 parents and their children have opted out of the SBAC test. This is by far the largest testing protest ever in the State of Washington. The parents and students of Washington state have sent a clear message to legislators in Olympia: It is time to end the unfair, invalid and unreliable SBAC test!