Given this paragraph about a country, what is the most populous Spanish-speaking country?

Throughout the 19th century, the population of Mexico had barely doubled. This trend continued during the first two decades of the 20th century. The 1921 census reported a loss of about 1 million inhabitants. The Mexican Revolution (c. 1910–1920) greatly impacted population increases. The growth rate increased dramatically between the 1930s and the 1980s, when the country registered growth rates of over 3% (1950–1980). The Mexican population doubled in twenty years, and at that rate it was expected that by 2000 there would be 120 million people living in Mexico. Life expectancy increased from 36 years (in 1895) to 72 years (in the year 2000). According to estimations made by Mexico's National Geography and Statistics Institute, is estimated in 2022 to be 129,150,971[300] as of 2017 Mexico had 123.5 million inhabitants[301] making it the most populous Spanish-speaking country in the world.[302]

Mexico