Interval              MPECS Discovery Observations
2001                      15         0          131
2002                      46         0          477
2003                      56         0          408
2004                      46         0          362
2005                      42         0          348
2006                      67         0          507
2007                      73         0          497
2008                      65         0          569
2009                      58         0          526
2010                      62         0          431
2011                      23         0          555
2012                      17         0          418
2013                      22         0          563
2014                      21         0          599
2015                      27         0          650
2016                      20         0          679
2017                      24         0          696
2018                      28         0          710
2019                      27         0          616
2020                      44         0          974
2021                      32         0         1011
2022                      59         0         1075
2023                      50         0          914
2024                      41         0          759
2025                      52         0          823
2026                      50         0          649