Central Bank of Brazil
Brazilian monetary authority; its Time Series Management System (SGS) provides the exchange rate series used.
Evidence
According to series 1 of the Central Bank's SGS (dollar, selling rate), the annual average exchange rate was R$2.1605 (2013), 2.3547 (2014), 3.3387 (2015), 3.4833 (2016), 3.1925 (2017), 3.6558 (2018), and 3.9461 (2019); at the end of 2013, 2.3426; 2014, 2.6562; 2015, 3.9048.
Official dataProven in a document
Source: Banco Central do Brasil — SGS série 1 (taxa de câmbio livre, dólar americano, venda, diária) — Central Bank of Brazil, Dec. 31, 2019 · calculation in series/cambio_anual.csv (scripts/gera_series_macro.py) · open original ↗

