Financial report context:
management 2019s discussion and analysis net interest income 2013 versus 2012 . net interest income on the consolidated statements of earnings was $ 3.39 billion for 2013 , 13% ( 13 % ) lower than 2012 . the decrease compared with 2012 was primarily due to lower average yields on financial instruments owned , at fair value , partially offset by lower interest expense on financial instruments sold , but not yet purchased , at fair value and collateralized financings . 2012 versus 2011 . net interest income on the consolidated statements of earnings was $ 3.88 billion for 2012 , 25% ( 25 % ) lower than 2011 . the decrease compared with 2011 was primarily due to lower average yields on financial instruments owned , at fair value and collateralized agreements . see 201cstatistical disclosures 2014 distribution of assets , liabilities and shareholders 2019 equity 201d for further information about our sources of net interest income . operating expenses our operating expenses are primarily influenced by compensation , headcount and levels of business activity . compensation and benefits includes salaries , discretionary compensation , amortization of equity awards and other items such as benefits . discretionary compensation is significantly impacted by , among other factors , the level of net revenues , overall financial performance , prevailing labor markets , business mix , the structure of our share-based compensation programs and the external environment . the table below presents our operating expenses and total staff ( which includes employees , consultants and temporary staff ) . .

Financial table:
$ in millions: compensation and benefits; year ended december 2013: $ 12613; year ended december 2012: $ 12944; year ended december 2011: $ 12223
$ in millions: brokerage clearing exchange anddistribution fees; year ended december 2013: 2341; year ended december 2012: 2208; year ended december 2011: 2463
$ in millions: market development; year ended december 2013: 541; year ended december 2012: 509; year ended december 2011: 640
$ in millions: communications and technology; year ended december 2013: 776; year ended december 2012: 782; year ended december 2011: 828
$ in millions: depreciation and amortization; year ended december 2013: 1322; year ended december 2012: 1738; year ended december 2011: 1865
$ in millions: occupancy; year ended december 2013: 839; year ended december 2012: 875; year ended december 2011: 1030
$ in millions: professional fees; year ended december 2013: 930; year ended december 2012: 867; year ended december 2011: 992
$ in millions: insurance reserves1; year ended december 2013: 176; year ended december 2012: 598; year ended december 2011: 529
$ in millions: other expenses; year ended december 2013: 2931; year ended december 2012: 2435; year ended december 2011: 2072
$ in millions: total non-compensation expenses; year ended december 2013: 9856; year ended december 2012: 10012; year ended december 2011: 10419
$ in millions: total operating expenses; year ended december 2013: $ 22469; year ended december 2012: $ 22956; year ended december 2011: $ 22642
$ in millions: total staff at period-end; year ended december 2013: 32900; year ended december 2012: 32400; year ended december 2011: 33300

Additional report context:
1 . related revenues are included in 201cmarket making 201d in the consolidated statements of earnings . goldman sachs 2013 annual report 45 .

Question: what is the percentage change in staff number in 2013?
Answer: 1.5%