Figure 2
The horizontal axis is labeled “Year” and displays continuous yearly values from 1989 through 2021. The vertical axis is labeled “Number of articles” and ranges from 0 to 9 in increments of 1 unit. A single line connects the number of published articles for each year. At the beginning of the period (1989 to 1995), the line fluctuates between 0 and 1. From 1996 through 1998, it rises slightly to 2 before dropping back to 0 in 2000. In the early 2000s, noticeable spikes appear: the line reaches 4 in 2002, then drops again and fluctuates between 1 and 3 from 2003 to 2010. After 2011, the line shows a general upward trend, reaching 4 in 2012 and then rising sharply to 7 in 2017. The highest point occurs in 2019 with 8 published articles, followed by a slight decline to 6 in 2021.Trend of published articles in the period 1989–2021