Washington residents paid $10,974 to attend the four-year public institution this year $221 more than the $10,753 charged for 2016-17.
Non-residents paid 223.8 percent more than residents this year, or $35,538. Their price tag grew 2.1 percent from $34,791 in 2016-17.
About 68 percent of the school's undergraduate population are Washington residents. About 17 percent are residents of other states and 15 percent are citizens of other countries.
Data shows 58 percent of full-time undergraduates who started school in 2015-16 received student financial aid in some form. In all, 2,846 students received grants or scholarships totaling $37.36 million and 1,880 students took out student loans totaling more than $11.4 million.
Including all undergraduates, 13,805 students used grants or scholarships totaling $188.5 million. Another 8,887 took out $56.73 million in federal student loans.