Please answer the given financial question based on the context.
Context: equity equity at december 31 , 2014 was $ 6.6 billion , a decrease of $ 1.6 billion from december 31 , 2013 . the decrease resulted primarily due to share repurchases of $ 2.3 billion , $ 273 million of dividends to shareholders , and an increase in accumulated other comprehensive loss of $ 760 million , partially offset by net income of $ 1.4 billion . the $ 760 million increase in accumulated other comprehensive loss from december 31 , 2013 , primarily reflects the following : 2022 negative net foreign currency translation adjustments of $ 504 million , which are attributable to the strengthening of the u.s . dollar against certain foreign currencies , 2022 an increase of $ 260 million in net post-retirement benefit obligations , 2022 net derivative gains of $ 5 million , and 2022 net investment losses of $ 1 million . review by segment general we serve clients through the following segments : 2022 risk solutions acts as an advisor and insurance and reinsurance broker , helping clients manage their risks , via consultation , as well as negotiation and placement of insurance risk with insurance carriers through our global distribution network . 2022 hr solutions partners with organizations to solve their most complex benefits , talent and related financial challenges , and improve business performance by designing , implementing , communicating and administering a wide range of human capital , retirement , investment management , health care , compensation and talent management strategies . risk solutions .
|years ended december 31 ( millions except percentage data )|2014|2013|2012|
|revenue|$ 7834|$ 7789|$ 7632|
|operating income|1648|1540|1493|
|operating margin|21.0% ( 21.0 % )|19.8% ( 19.8 % )|19.6% ( 19.6 % )|
the demand for property and casualty insurance generally rises as the overall level of economic activity increases and generally falls as such activity decreases , affecting both the commissions and fees generated by our brokerage business . the economic activity that impacts property and casualty insurance is described as exposure units , and is most closely correlated with employment levels , corporate revenue and asset values . during 2014 , pricing was flat on average globally , and we would still consider this to be a "soft market." in a soft market , premium rates flatten or decrease , along with commission revenues , due to increased competition for market share among insurance carriers or increased underwriting capacity . changes in premiums have a direct and potentially material impact on the insurance brokerage industry , as commission revenues are generally based on a percentage of the premiums paid by insureds . additionally , continuing through 2014 , we faced difficult conditions as a result of continued weakness in the global economy , the repricing of credit risk and the deterioration of the financial markets . weak economic conditions in many markets around the globe have reduced our customers' demand for our retail brokerage and reinsurance brokerage products , which have had a negative impact on our operational results . risk solutions generated approximately 65% ( 65 % ) of our consolidated total revenues in 2014 . revenues are generated primarily through fees paid by clients , commissions and fees paid by insurance and reinsurance companies , and investment income on funds held on behalf of clients . our revenues vary from quarter to quarter throughout the year as a result of the timing of our clients' policy renewals , the net effect of new and lost business , the timing of services provided to our clients , and the income we earn on investments , which is heavily influenced by short-term interest rates . we operate in a highly competitive industry and compete with many retail insurance brokerage and agency firms , as well as with individual brokers , agents , and direct writers of insurance coverage . specifically , we address the highly specialized .
Question: what is the fluctuation between the lowest and average operating margin?


Answer: The answer is:0.00533