The time evolution of average price of each rental property type since January 1, 2018. The trend lines are estimated using KLLR method with a Gaussian kernel of size 45 days. The shaded regions are 68 % confidence intervals. The black solid line is February, 252,020 when CDC indicated that COVID-19 is heading toward pandemic status. The dashed lines are the same date but in 2018, 2019, and 2021.