Observed stars as a function of the distance for the sample of Sun-like stars. Each of the six panels shows the total number of stars in gray and the number of observed stars for two different scenarios: (1) median exozodiacal dust level of 3 zodi and interferometric baseline length optimization for the center of the opt HZ in dark orange, and (2) the same, but with a median exozodiacal dust level of 12 zodi in light orange. The top row is based on the hab2min and the bottom row is based on the hab2max planet populations (see Sect. 2.2), while the left, middle, and right columns show the predicted yields for 1, 2, and 3.5 m mirrors, respectively.