pre_text: devon energy corporation and subsidiaries notes to consolidated financial statements 2014 ( continued ) the following methods and assumptions were used to estimate the fair values in the tables above . fixed-income securities 2014 devon 2019s fixed-income securities consist of u.s . treasury obligations , bonds issued by investment-grade companies from diverse industries , and asset-backed securities . these fixed-income securities are actively traded securities that can be redeemed upon demand . the fair values of these level 1 securities are based upon quoted market prices . devon 2019s fixed income securities also include commingled funds that primarily invest in long-term bonds and u.s . treasury securities . these fixed income securities can be redeemed on demand but are not actively traded . the fair values of these level 2 securities are based upon the net asset values provided by the investment managers . equity securities 2014 devon 2019s equity securities include a commingled global equity fund that invests in large , mid and small capitalization stocks across the world 2019s developed and emerging markets . these equity securities can be redeemed on demand but are not actively traded . the fair values of these level 2 securities are based upon the net asset values provided by the investment managers . at december 31 , 2010 , devon 2019s equity securities consisted of investments in u.s . large and small capitalization companies and international large capitalization companies . these equity securities were actively traded securities that could be redeemed upon demand . the fair values of these level 1 securities are based upon quoted market prices . at december 31 , 2010 , devon 2019s equity securities also included a commingled fund that invested in large capitalization companies . these equity securities could be redeemed on demand but were not actively traded . the fair values of these level 2 securities are based upon the net asset values provided by the investment managers . other securities 2014 devon 2019s other securities include commingled , short-term investment funds . these securities can be redeemed on demand but are not actively traded . the fair values of these level 2 securities are based upon the net asset values provided by investment managers . devon 2019s hedge fund and alternative investments include an investment in an actively traded global mutual fund that focuses on alternative investment strategies and a hedge fund of funds that invests both long and short using a variety of investment strategies . devon 2019s hedge fund of funds is not actively traded and devon is subject to redemption restrictions with regards to this investment . the fair value of this level 3 investment represents the fair value as determined by the hedge fund manager . included below is a summary of the changes in devon 2019s level 3 plan assets ( in millions ) . .
post_text: .
table: December 31, 2009 $51
table: Purchases 3
table: Investment returns 4
table: December 31, 2010 58
table: Purchases 33
table: Investment returns (1)
table: December 31, 2011 $90
question: Analyse this data from a financial earnings document. what was the percentage change in devon 2019s level 3 plan assets from 2010 to 2011