Figure 2
The horizontal axis contains seven categorical markings that read “1990 to 1994”, “1995 to 1999”, “2000 to 2004”, “2005 to 2009”, “2010 to 2014”, “2015 to 2019”, and “2020 to 2024”. The vertical axis ranges from 0 to 200 in increments of 20 units. The graph shows seven vertical bars indicating the number of selected publications corresponding to every five years. The values for the bars are as follows. 1990 to 1994: 3. 1995 to 1999: 9. 2000 to 2004: 32. 2005 to 2009: 88. 2010 to 2014: 159. 2015 to 2019: 186. 2020 to 2024: 141.Selected publications (Step 1) grouped in 5-year intervals (n = 618). Source: Author's own work