China's power consumption rose 11.35 percent in October from a year earlier, slowing from September's 12.2-percent growth, the National Energy Administration (NEA) said Tuesday.

The country's total power usage reached 379.7 billion kilowatt-hours (kwh) in October, the NEA said in a statement on its website.

In the first ten months, electricity consumption totaled 3.90 trillion kwh, up 11.87 percent year-on-year, the statement said.

Tertiary industries recorded the fastest yearly electricity consumption growth of 13.62 percent in the first ten months, with total consumption hitting 425.2 billion kwh.

Primary industries saw growth amounting to 87.2 billion kwh in the January-October period, up 4.38 percent year-on-year, while secondary industries used 2.91 trillion kwh, up 12.16 percent.

Residents in urban and rural areas consumed 473.7 billion kwh of electricity in the first ten months, up 10.1 percent year-on-year, according to NEA.

The country invested 276 billion yuan (43.53 billion U.S. dollars) in power projects from January to October. The total included 70.8 billion yuan for hydroelectric power projects, 81.8 billion yuan for thermal power projects, 60 billion yuan for nuclear power projects and 55 billion yuan for wind power projects.