Figure 4
The horizontal axis is marked with twenty-four years from left to right as follows: “2014,” “2014,” “2014,” “2020,” “2018,” “2012,” “2014,” “2017,” “2015,” “2019,” “2014,” “2013,” “2021,” “2017,” “2023,” “2016,” “2019,” “2022,” “2023,” “2021,” “2020,” “2021,” “2016,” and “2021.” The vertical axis ranges from 0 to 300 in increments of 50 units. The graph shows twenty-four vertical bars. The data for the twenty-four bars are as follows: 2014: 295. 2014: 274. 2014: 246. 2020: 220. 2018: 218. 2012: 184. 2014: 174. 2017: 173. 2015: 142. 2019: 138. 2019: 135. 2014: 124. 2021: 117. 2017: 108. 2023: 100. 2016: 88. 2019: 87. 2022: 79. 2023: 68. 2021: 64. 2020: 63. 2021: 60. 2016: 59. 2021: 59.Article citations and year. Source: Created by authors