Figure 5
A line graph displays the number of articles published each year from 2015 to 2025. The horizontal axis represents the publication year, ranging from 2015 to 2025. The vertical axis represents the number of articles, ranging from 0 to 4. Two trend lines are shown: one in light blue labeled 'Trend (all years)' and another in dark blue labeled 'Trend (without 2025)'. The light blue trend line shows a steady increase in the number of articles over the years, while the dark blue trend line also shows an increase but diverges slightly from the light blue line. Grey bars indicate the actual number of articles published in specific years, with notable increases in 2023, 2024, and 2025.Publication years of included studies. Source: Authors’ own work