Given the following information, calculate the effective tax rate expressed in mills $($not percentage$)$:

Fair market value of property: $$280,000$

Assessed value of property: $50\%$ of fair market value

Exemptions: $$20,000$

Annual tax liability: $$4,685\mathrm{.}10$

$($Input your answer rounded to the nearest hundredth, e$.$g$.,20\mathrm{.}15)$