The horizontal axis represents years and ranges from 1999 to 2023 in increments of 1 unit. The vertical axis ranges from 0 to 12 in increments of 2 units. The graph shows a curve starting at (1999, 1) and passing through several peaks and troughs, and some of the points it passes through are as follows: (2000, 0), (2004, 0), (2005, 2), (2007, 0), (2009, 4), (2010, 2), (2012, 3), (2013, 1), (2015, 10), (2016, 2), (2018, 11), (2020, 7), (2022, 8), and it ends at (2023, 3). Note: All numerical data values are approximated.