!!!Did you know this about Estonia? Did you know that Estonia is very low in ranking among 193 countries in the following 4 respects. #Irrigated Land - sq km: 4.58 (Rank 165). #Heliports - : 1.0 (Rank 94). #Maternal mortality rate - deaths/100,000 live births: 2.0 (Rank 181). #% Irrigated land - : 0.01 (Rank 168).