Please see links below to read more about this

http://www.thestand.org/2017/09/li-proposes-2-5-rate-decrease-for-workers-compensation-in-2018/
http://lni.wa.gov/News/2017/rates.asp
http://www.thestand.org/2017/09/li-proposes-2-5-rate-decrease-for-workers-compensation-in-2018/
http://lni.wa.gov/News/2017/rates.asp