Figure 3.
The chart shows annual publication counts for urban and non-urban studies from 2016 to 2023. Urban studies appear in 2016, 2018, 2020, 2021, 2022, and 2023, with the highest count in 2021. Non-urban studies appear only in 2020, 2021, and 2022, also peaking in 2021. The horizontal axis lists years from 2016 to 2023, and the vertical axis shows counts from zero to eight. Each year contains one or two bars indicating whether studies belong to the urban or non-urban group.Frequency of years of publication
Source: Authors’ own work