Figure 2
The horizontal axis is labeled “Publication year”, and ranges from 1976 to 2021 in increments of 5 units. The vertical axis is labeled “Number of Articles”, and ranges from 0 to 80 in increments of 10 units. The graph shows four curves. At the top-left of the plot area, the legend shows a blue curve labeled “Total”, an orange curve labeled “Diversity”, a gray curve labeled “Equity”, and a green curve labeled “Inclusion”. The horizontal axis is divided into 4 phases. From left to right, the phase divisions are as follows: “Phase 1” is from 1976 to 1994, “Phase 2” is from 1994 to 2011, “Phase 3” is from 2011 to 2018, “Phase 4” is from 2018 to 2022. The “Total” curve begins at (1976, 0), and remains below 3 articles until 1991. It rises gradually, and passes through many points forming sharp peaks and troughs, and some points are as follows (1994, 7.6) (2001, 7.6), (2006, 11.6), (2011, 38.02) (2016, 42.5), (2016, 55.4), (2021, 71.2), and ends at (2022, 64.6). The “Diversity” curve begins at (1976, 0), and remains below 3 articles until 1991. It rises gradually, and passes through many points forming sharp peaks and troughs, and some points are as follows (1996, 8.45) (2001, 7.6), (2006, 11.8), (2008, 20.5), (2011, 36), (2018, 43.5), (2021, 55.40), and ends at (2022, 48.32). The “Equity” curve begins at (1976, 0), and remains below 5 articles until 2011. It rises gradually, and passes through many points forming sharp peaks and troughs, and some points are as follows (2014, 7.36) (2016, 6.07), (2018, 7.13), (2021, 8.7), and ends at (2022, 8.45). The “Inclusion” curve begins at (1976, 0), and remains below 3 articles until 2012. It rises gradually, and passes through many points forming sharp peaks and troughs, and some points are as follows (2015, 9.2) (2016, 7.13), (2017, 17.43), (2021, 22.9), and ends at (2022, 26.9). Note: All numerical data values are approximated.Number of articles by year