an average of 7.1 in 2000 . the top 100 largest clients used an average of 11.3 products in 2001 , up from an average of 11.2 in 2000 . state street benefits significantly from its ability to derive revenue from the transaction flows of clients . this occurs through the management of cash positions , including deposit balances and other short-term investment activities , using state street 2019s balance sheet capacity . significant foreign currency transaction volumes provide potential for foreign exchange trading revenue as well . fee revenue total operating fee revenuewas $ 2.8 billion in 2001 , compared to $ 2.7 billion in 2000 , an increase of 6% ( 6 % ) . adjusted for the formation of citistreet , the growth in fee revenue was 8% ( 8 % ) . growth in servicing fees of $ 199million , or 14% ( 14 % ) , was the primary contributor to the increase in fee revenue . this growth primarily reflects several large client wins installed starting in the latter half of 2000 and continuing throughout 2001 , and strength in fee revenue from securities lending . declines in equity market values worldwide offset some of the growth in servicing fees . management fees were down 5% ( 5 % ) , adjusted for the formation of citistreet , reflecting the decline in theworldwide equitymarkets . foreign exchange trading revenue was down 5% ( 5 % ) , reflecting lower currency volatility , and processing fees and other revenue was up 21% ( 21 % ) , primarily due to gains on the sales of investment securities . servicing and management fees are a function of several factors , including the mix and volume of assets under custody and assets under management , securities positions held , and portfolio transactions , as well as types of products and services used by clients . state street estimates , based on a study conducted in 2000 , that a 10% ( 10 % ) increase or decrease in worldwide equity values would cause a corresponding change in state street 2019s total revenue of approximately 2% ( 2 % ) . if bond values were to increase or decrease by 10% ( 10 % ) , state street would anticipate a corresponding change of approximately 1% ( 1 % ) in its total revenue . securities lending revenue in 2001 increased approximately 40% ( 40 % ) over 2000 . securities lending revenue is reflected in both servicing fees and management fees . securities lending revenue is a function of the volume of securities lent and interest rate spreads . while volumes increased in 2001 , the year-over-year increase is primarily due to wider interest rate spreads resulting from the unusual occurrence of eleven reductions in the u.s . federal funds target rate during 2001 . f e e r e v e n u e ( dollars in millions ) 2001 ( 1 ) 2000 1999 ( 2 ) change adjusted change 00-01 ( 3 ) .

Table: ( dollars in millions ) 2001 ( 1 ) 2000 1999 ( 2 ) change 00-01 adjusted change 00-01 ( 3 ) servicing fees $ 1624 $ 1425 $ 1170 14% ( 14 % ) 14% ( 14 % ) management fees 511 581 600 -12 ( 12 ) -5 ( 5 ) foreign exchange trading 368 387 306 -5 ( 5 ) -5 ( 5 ) processing fees and other 329 272 236 21 21 total fee revenue $ 2832 $ 2665 $ 2312 6 8

( 1 ) 2001 results exclude the write-off of state street 2019s total investment in bridge of $ 50 million ( 2 ) 1999 results exclude the one-time charge of $ 57 million related to the repositioning of the investment portfolio ( 3 ) 2000 results adjusted for the formation of citistreet 4 state street corporation .

Question: what is the percent change of servicing fees between 1999 and 2000?
Answer: 21.7%
Calculation: divide(subtract(1425, 1170), 1170)