Table 2.

Yearly distribution of observations.

Year	Freq	Percent	Cum
2011	230	2.77	2.77
2012	1134	13.64	16.41
2013	1351	16.26	32.67
2014	1420	17.09	49.76
2015	1400	16.85	66.61
2016	541	6.51	73.12
2017	487	5.86	78.98
2018	559	6.72	85.70
2019	642	7.73	93.43
2020	546	6.57	100.00
Total	8310	100.00