(Adds background, clarifies that figure is nominal GDP)

BEIJING, Nov 22 (Reuters) - China on Friday revised up itsnominal 2018 gross domestic product (GDP) by 2.1% to 91.93trillion yuan ($13.08 trillion), keeping it on track toachieving its goal of doubling the size of its economy by 2020from 2010.

The revisions showed that the services sector contributedmore to GDP in 2018 than the original data had indicated, theNational Bureau of Statistics said in a statement.

The change in the size of 2018 GDP will not significantlyinfluence the calculation for the 2019 growth rate, thestatistics bureau said.

The world's second-biggest economy is growing at its slowestpace in almost three decades, pressured in part by a trade warwith the United States.

China routinely revises its annual GDP data. Days before GDPdata for 2018 was released in January, the statistics bureau cutits final 2017 growth figure to 6.8% from 6.9%.

China's fourth National Economic Census, released onWednesday, included "richer" data points that showed morebusiness entities and a bigger total asset base in 2018 thanassumed under earlier GDP estimates, Li Xiaochao, deputy head ofthe statistics bureau, told Reuters earlier this week.

Revisions to historical GDP figures will also be made, Litold reporters.

The government's target range for 2019 growth is 6%-6.5%.The economy expanded 6.4% in the first quarter, 6.2% in thesecond and 6.0% in the third - the weakest pace since 1992.

Growth of about 6.2% is seen needed for the whole of thisyear and the next to meet the Communist Party's longstandinggoal of doubling GDP and incomes in the decade to 2020.

($1 = 7.0283 Chinese yuan renminbi)

(Reporting by Gabriel Crossley; Editing by Kim Coghill & ShriNavaratnam) ((Gabriel.Crossley@thomsonreuters.com; +86 10 5669 2127;))