San Marino. According to CountryAAH, the total population in San Marino is 33,942 people in 2020. Growth in San Marino’s economy was found in a report from the International Monetary Fund (IMF) has slowed down significantly since the turn of the millennium, and is projected to be only 2% during the year. That was about a quarter of the growth in the 1990s and significantly less than other small states in Europe. The reason was stated that San Marino lost competitive advantages due to inflexible labor market, reduced tax benefits and greater price competition in the immediate area.