Figure 2
The line chart titled “Documents by year” shows the horizontal axis labeled “Year” ranging from 1996 to 2024 in increments of 2 years, and the vertical axis labeled “Documents” ranging from 0 to 20 in increments of 5 units. A single line with markers represents the number of documents for each year. The line starts at (1996, 1), drops to (1997, 0), remains at 0 for several years, rises to (2001, 1), fluctuates around 0 and 1 until (2012, 1), returns to 0 around 2013 to 2017, increases to (2018, 2), rises sharply to (2019, 12), peaks at (2020, 18), decreases to (2021, 12), remains at (2022, 12), and increases again to (2024, 15). Note: All numerical data values are approximated.Marketing and Industry 4.0 trend