How much does it cost to visit seaattles space nedle?

How much does it cost to visit seaattles space nedle?
Adult (ages 14-64): $17.00
Youth (ages 4-13): $9.00
Child (age 3 & under): Free
Senior (ages 65+): $15.00
Active Military Adult w/ ID: $15.00
Active Military Youth w/ ID: $8.00