Debt as a ratio of gross domestic product was 99.55 percent according to Reuters calculations using the most recent National Statistics Institute (INE) growth data for the full year 2017.
That compared to a calculated debt-to-GDP ratio of 98.47 percent in January.
Spain ended 2017 with a debt-to-GDP ratio of 98.3 percent of economic output, according to the Bank of Spain, and the government expects that to fall to 97.0 percent of its GDP this year.