ï»¿21.
CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) Changes in each component of Accumulated other comprehensive income (loss) for the three-year period ended DecemberÂ 31, 2010 are asâ€¯follows:
## Table 0 ##
(1)Reflects, among other items: the movements in the British pound, Euro, Japanese yen, Korean won, Polish zloty and Mexican peso against the U. S.  dollar, and changes in related tax effects andâ€¯hedges.
(2)Primarily driven by Citigroupâ€™s pay fixed/receive floating interest rate swap programs that are hedging the floating rates on deposits and long-termâ€¯debt.
(3)Reflects adjustments to the funded status of pension and postretirement plans, which is the difference between the fair value of the plan assets and the projected benefitâ€¯obligation.
(4)See Note 15 to the Consolidated Financial Statements for details of the unrealized gains and losses on Citigroupâ€™s available-for-sale and held-to-maturity securities and the net gains (losses) included inâ€¯income.
12.
BROKERAGE RECEIVABLES AND BROKERAGE PAYABLES The Company has receivables and payables for financial instruments sold to and purchased from brokers, dealers and customers, which arise in the ordinary course of business.
Citi is exposed to risk of loss from the inability of brokers, dealers or customers to pay for purchases or to deliver the financial instruments sold, in which case Citi would have to sell or purchase the financial instruments at prevailing market prices.
Credit risk is reduced to the extent that an exchange or clearing organization acts as a counterparty to the transaction and replaces the broker, dealer or customer in question.
Citi seeks to protect itself from the risks associated with customer activities by requiring customers to maintain margin collateral in compliance with regulatory and internal guidelines.
Margin levels are monitored daily, and customers deposit additional collateral as required.
Where customers cannot meet collateral requirements, Citi may liquidate sufficient underlying financial instruments to bring the customer into compliance with the required margin level.
Exposure to credit risk is impacted by market volatility, which may impair the ability of clients to satisfy their obligations to Citi.
Credit limits are established and closely monitored for customers and for brokers and dealers engaged in forwards, futures and other transactions deemed to be credit sensitive.
Brokerage receivables and Brokerage payables consisted of the following
## Table 1 ##
(1) Includes brokerage receivables and payables recorded by Citi broker-dealer entities that are accounted for in accordance with the AICPA Accounting Guide for Brokers and Dealers in Securities as codified in ASC 940-320.
2003 Compared With 2002 The increase in external sales revenue for 2003 compared to 2002 was primarily due to higher selling prices, for both PET polymers and polyethylene, which had a positive impact on sales revenue of $162 million.
A favorable shift in foreign currency exchange rates, particularly for the euro, also had a positive impact on sales revenue of $60 million.
Additionally, new industry capacity in North America that began production earlier in 2003 than the Company had anticipated, resulted in a smaller than expected increase in sales revenue from volume.
Operating earnings for 2003 increased compared to 2002 primarily due to a $14 million insurance settlement recorded as a credit to cost of sales in the earnings statement of 2003.
This settlement partially offsets the $39 million in charges to the cost of sales in 2002 for the operational disruptions that occurred in Europe and the United States.
Other factors impacting operating earnings included higher selling prices, for both PET polymers and polyethylene, and the positive impact of a favorable shift in foreign currency exchange rates, primarily for the euro.
The positive shifts in selling prices and foreign currency exchange rates were more than offset by higher raw material and energy costs, added PET polymers capacity in North America, which negatively impacted volumes, and asset impairments and restructuring charges of $2 million.
## Table 2 ##
2003 Compared With 2002 The slight decrease in external sales revenue for 2003 compared to 2002 was primarily due to an unfavorable shift in product mix, which had a negative impact on sales revenue of $57 million.
The unfavorable shift in product mix was primarily due to a decrease in sales of acetate tow in North America partially offset by increased sales of acetate tow in other parts of the world.
The shift in product mix was mostly offset by increases in sales volume, primarily for acetyl chemicals, and favorable shifts in foreign currency exchange rates, primarily for the euro, of $28 million and $16 million, respectively.
The decline in operating earnings for 2003 compared to 2002 was primarily due to an unfavorable shift in product mix, primarily due to a decline of acetate tow demand in North America that was partially offset by increased acetate tow demand in other parts of the world.
DEVELOPING BUSINESSES DIVISION

Tables referenced above, in order (Table 0 first):
<table><tr><td>In millions of dollars</td><td>Net unrealized gains (losses) on investment securities</td><td>Foreign currency translation adjustment, net of hedges</td><td>Cash flow hedges</td><td>Pension liability adjustments</td><td>Accumulated other comprehensive income (loss)</td></tr><tr><td>Balance at January 1, 2008</td><td>$471</td><td>$-772</td><td>$-3,163</td><td>$-1,196</td><td>$-4,660</td></tr><tr><td>Change in net unrealized gains (losses) on investment securities, net of taxes</td><td>-11,422</td><td>—</td><td>—</td><td>—</td><td>-11,422</td></tr><tr><td>Reclassification adjustment for net losses included in net income, net of taxes</td><td>1,304</td><td>—</td><td>—</td><td>—</td><td>1,304</td></tr><tr><td>Foreign currency translation adjustment, net of taxes-1</td><td>—</td><td>-6,972</td><td>—</td><td>—</td><td>-6,972</td></tr><tr><td>Cash flow hedges, net of taxes-2</td><td>—</td><td>—</td><td>-2,026</td><td>—</td><td>-2,026</td></tr><tr><td>Pension liability adjustment, net of taxes-3</td><td>—</td><td>—</td><td>—</td><td>-1,419</td><td>-1,419</td></tr><tr><td>Change</td><td>$-10,118</td><td>$-6,972</td><td>$-2,026</td><td>$-1,419</td><td>$-20,535</td></tr><tr><td>Balance at December 31, 2008</td><td>$-9,647</td><td>$-7,744</td><td>$-5,189</td><td>$-2,615</td><td>$-25,195</td></tr><tr><td>Cumulative effect of accounting change (ASC 320-10-35/FSP FAS 115-2</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>and FAS 124-2)</td><td>-413</td><td>—</td><td>—</td><td>—</td><td>-413</td></tr><tr><td>Balance at January 1, 2009</td><td>$-10,060</td><td>$-7,744</td><td>$-5,189</td><td>$-2,615</td><td>$-25,608</td></tr><tr><td>Change in net unrealized gains (losses) on investment securities, net of taxes(4)</td><td>5,268</td><td>—</td><td>—</td><td>—</td><td>5,268</td></tr><tr><td>Reclassification adjustment for net losses included in net income, net of taxes</td><td>445</td><td>—</td><td>—</td><td>—</td><td>445</td></tr><tr><td>Foreign currency translation adjustment, net of taxes-1</td><td>—</td><td>-203</td><td>—</td><td>—</td><td>-203</td></tr><tr><td>Cash flow hedges, net of taxes-2</td><td>—</td><td>—</td><td>2,007</td><td>—</td><td>2,007</td></tr><tr><td>Pension liability adjustment, net of taxes-3</td><td>—</td><td>—</td><td>—</td><td>-846</td><td>-846</td></tr><tr><td>Change</td><td>$5,713</td><td>$-203</td><td>$2,007</td><td>$-846</td><td>$6,671</td></tr><tr><td>Balance at December 31, 2009</td><td>$-4,347</td><td>$-7,947</td><td>$-3,182</td><td>$-3,461</td><td>$-18,937</td></tr><tr><td>Change in net unrealized gains (losses) on investment securities, net of taxes(4)</td><td>2,609</td><td>—</td><td>—</td><td>—</td><td>2,609</td></tr><tr><td>Reclassification adjustment for net gains included in net income, net of taxes</td><td>-657</td><td>—</td><td>—</td><td>—</td><td>-657</td></tr><tr><td>Foreign currency translation adjustment, net of taxes-1</td><td>—</td><td>820</td><td>—</td><td>—</td><td>820</td></tr><tr><td>Cash flow hedges, net of taxes-2</td><td>—</td><td>—</td><td>532</td><td>—</td><td>532</td></tr><tr><td>Pension liability adjustment, net of taxes-3</td><td>—</td><td>—</td><td>—</td><td>-644</td><td>-644</td></tr><tr><td>Change</td><td>$1,952</td><td>$820</td><td>$532</td><td>$-644</td><td>2,660</td></tr><tr><td>Balance at December 31, 2010</td><td>$-2,395</td><td>$-7,127</td><td>$-2,650</td><td>$-4,105</td><td>$-16,277</td></tr></table>
<table><tr><td></td><td>December 31,</td></tr><tr><td>In millions of dollars</td><td>2018</td><td>2017</td></tr><tr><td>Receivables from customers</td><td>$14,415</td><td>$19,215</td></tr><tr><td>Receivables from brokers, dealers and clearing organizations</td><td>21,035</td><td>19,169</td></tr><tr><td>Total brokerage receivables<sup>-1</sup></td><td>$35,450</td><td>$38,384</td></tr><tr><td>Payables to customers</td><td>$40,273</td><td>$38,741</td></tr><tr><td>Payables to brokers, dealers and clearing organizations</td><td>24,298</td><td>22,601</td></tr><tr><td>Total brokerage payables<sup>-1</sup></td><td>$64,571</td><td>$61,342</td></tr></table>
<table><tr><td>(Dollars in millions)</td><td>2003</td><td>2002</td><td>Change</td></tr><tr><td>External Sales</td><td>$635</td><td>$642</td><td>-1 %</td></tr><tr><td>Volume effect</td><td></td><td></td><td>4 %</td></tr><tr><td>Price effect</td><td></td><td></td><td>1 %</td></tr><tr><td>Product mix effect</td><td></td><td></td><td>-9 %</td></tr><tr><td>Exchange rate effect</td><td></td><td></td><td>3 %</td></tr><tr><td>Interdivisional sales</td><td>80</td><td>72</td><td>11 %</td></tr><tr><td>Operating earnings</td><td>125</td><td>133</td><td>-6 %</td></tr><tr><td>Asset impairments and restructuring charges, net</td><td>1</td><td>--</td><td></td></tr></table>

Question: What's the average of Balance at January 1, 2008 of Pension liability adjustments, and Receivables from customers of December 31, 2017 ?
Answer: 10205.5
Reasoning program: add(1196.0,19215.0), divide(#0,const_2)