LIMA, Jan 6 (Reuters) - Peru reported on Thursday that its tax revenue as a share of gross domestic product reached 16.1% in 2021, the highest level in seven years, driven by a strong economic recovery and higher proceeds from exports - mainly copper. Peru"s tax authority SUNAT said in a statement that the country"s tax revenue totaled 139.952 million soles ($35.44 million) in 2021, up 44.4% from 2020 and 19.2% from 2019, exceeding expectations. SUNAT"s head Luis Enrique Vera said the figures came on the back of a 13.2% economic growth last year, according to the central bank"s projections, and were also boosted by rising intern demand and higher global metal prices. Peru is the world"s second-largest copper producer. ($1 = 3.9492 soles)