Figure 3.
This image presents a stacked bar chart illustrating the distribution of data across six clusters labeled from Cluster 1 to Cluster 6 over a time range from 2014 to 2024. The x-axis represents the years, with each year clearly marked. The y-axis indicates the quantity levels, ranging from zero to fourteen. Each cluster is represented by a different color stacked within the bars for each year, allowing for an easy comparison of the contributions of each cluster over the specified years. The chart shows fluctuations in cluster contributions, particularly notable increases in specific years, reflecting changes in data distribution over time.Trend of publication over time
Source: Authors’ own work