what is the growth rate in the number of employees from 2000 to 2001?
operating expenses operating expenses were $ 2.9 billion , an increase of 8% ( 8 % ) over 2000 . adjusted for the formation of citistreet , operating expenses grew 10% ( 10 % ) . expense growth in 2001 of 10% ( 10 % ) is significantly lower than the comparable 20% ( 20 % ) expense growth for 2000 compared to 1999 . state street successfully reduced the growth rate of expenses as revenue growth slowed during the latter half of 2000 and early 2001 . the expense growth in 2001 reflects higher expenses for salaries and employee benefits , as well as information systems and communications . o p e r a t i n g e x p e n s e s ( dollars in millions ) 2001 2000 1999 change adjusted change 00-01 ( 1 ) .

| (Dollars in millions) | 2001 | 2000 | 1999 | Change 00-01 | Adjusted Change 00-01(1) |
| :--- | :--- | :--- | :--- | :--- | :--- |
| Salaries and employee benefits | $1,663 | $1,524 | $1,313 | 9% | 11% |
| Information systems and communications | 365 | 305 | 287 | 20 | 22 |
| Transaction processing services | 247 | 268 | 237 | (8) | (7) |
| Occupancy | 229 | 201 | 188 | 15 | 16 |
| Other | 363 | 346 | 311 | 5 | 7 |
| Total operating expenses | $2,867 | $2,644 | $2,336 | 8 | 10 |
| Number of employees | 19,753 | 17,604 | 17,213 | 12 |  |

( 1 ) 2000 results adjusted for the formation of citistreet expenses related to salaries and employee benefits increased $ 139million in 2001 , or $ 163millionwhen adjusted for the formation of citistreet . the adjusted increase reflects more than 2100 additional staff to support the large client wins and new business from existing clients and acquisitions . this expense increase was partially offset by lower incentive-based compensation . information systems and communications expense was $ 365 million in 2001 , up 20% ( 20 % ) from the prior year . adjusted for the formation of citistreet , information systems and communications expense increased 22% ( 22 % ) . this growth reflects both continuing investment in software and hardware , aswell as the technology costs associated with increased staffing levels . expenses related to transaction processing services were $ 247 million , down $ 21 million , or 8% ( 8 % ) . these expenses are volume related and include external contract services , subcustodian fees , brokerage services and fees related to securities settlement . lower mutual fund shareholder activities , and lower subcustodian fees resulting from both the decline in asset values and lower transaction volumes , drove the decline . occupancy expensewas $ 229million , up 15% ( 15 % ) . the increase is due to expenses necessary to support state street 2019s global growth , and expenses incurred for leasehold improvements and other operational costs . other expenses were $ 363 million , up $ 17 million , or 5% ( 5 % ) . these expenses include professional services , advertising and sales promotion , and internal operational expenses . the increase over prior year is due to a $ 21 million increase in the amortization of goodwill , primarily from acquisitions in 2001 . in accordance with recent accounting pronouncements , goodwill amortization expense will be eliminated in 2002 . state street recorded approximately $ 38 million , or $ .08 per share after tax , of goodwill amortization expense in 2001 . state street 2019s cost containment efforts , which reduced discretionary spending , partially offset the increase in other expenses . state street corporation 9 .

employees_2001 = 19753
employees_2000 = 17604
change = employees_2001 - employees_2000
percent_change = change / employees_2000
answer = percent_change * 100