Figure 1.
The bar chart presents the annual distribution of publications between 1980 and 2025. The y-axis represents the number of publications, ranging from 0 to 16, while the x-axis represents years. Publications remained low at 1 to 2 per year until the late 1990s, then gradually increased. Notable peaks include 8 publications in 2005 and 2016, 11 in 2018, 12 in 2019, and the highest at 15 in 2023 and 2024. The lowest values appear in the early 1980s and late 1990s with only 1 publication per year.Publication trend
Source: Authors’ own work