{"pre_text": ["entergy mississippi , inc .", "management's financial discussion and analysis other regulatory charges ( credits ) have no material effect on net income due to recovery and/or refund of such expenses .", "other regulatory credits increased primarily due to the under-recovery through the grand gulf rider of grand gulf capacity charges .", "2003 compared to 2002 net revenue , which is entergy mississippi's measure of gross margin , consists of operating revenues net of : 1 ) fuel , fuel-related , and purchased power expenses and 2 ) other regulatory charges ( credits ) .", "following is an analysis of the change in net revenue comparing 2003 to 2002. ."], "post_text": ["the increase in base rates was effective january 2003 as approved by the mpsc .", "gross operating revenue , fuel and purchased power expenses , and other regulatory charges ( credits ) gross operating revenues increased primarily due to an increase in base rates effective january 2003 and an increase of $ 29.7 million in fuel cost recovery revenues due to quarterly changes in the fuel factor resulting from the increases in market prices of natural gas and purchased power .", "this increase was partially offset by a decrease of $ 35.9 million in gross wholesale revenue as a result of decreased generation and purchases that resulted in less energy available for resale sales .", "fuel and fuel-related expenses decreased primarily due to the decreased recovery of fuel and purchased power costs and decreased generation , partially offset by an increase in the market price of purchased power .", "other regulatory charges increased primarily due to over-recovery of capacity charges related to the grand gulf rate rider and the cessation of the grand gulf accelerated recovery tariff that was suspended in july 2003 .", "other income statement variances 2004 compared to 2003 other operation and maintenance expenses increased primarily due to : 2022 an increase of $ 6.6 million in customer service support costs ; and 2022 an increase of $ 3.7 million in benefit costs .", "the increase was partially offset by the absence of the voluntary severance program accruals of $ 7.1 million that occurred in 2003 .", "taxes other than income taxes increased primarily due to a higher assessment of ad valorem and franchise taxes compared to the same period in 2003 .", "2003 compared to 2002 other operation and maintenance expenses increased primarily due to : 2022 voluntary severance program accruals of $ 7.1 million ; and 2022 an increase of $ 4.4 million in benefit costs. ."], "table": [["", "( in millions )"], ["2002 net revenue", "$ 380.2"], ["base rates", "48.3"], ["other", "-1.9 ( 1.9 )"], ["2003 net revenue", "$ 426.6"]], "table_ori": [["", "(In Millions)"], ["2002 net revenue", "$380.2"], ["Base rates", "48.3"], ["Other", "(1.9)"], ["2003 net revenue", "$426.6"]]}

Question: what is the increase in operation and maintenance expenses as a percentage of net revenue in 2003?
Evidence:
table_4: the 2003 net revenue of ( in millions ) is $ 426.6 ;
text_4: following is an analysis of the change in net revenue comparing 2003 to 2002. .
text_10: other income statement variances 2004 compared to 2003 other operation and maintenance expenses increased primarily due to : 2022 an increase of $ 6.6 million in customer service support costs ; and 2022 an increase of $ 3.7 million in benefit costs .
Program: add(6.6, 3.7), divide(#0, 426.6)
Answer:
str_answer: 2.41%
exe_answer: 0.02414