Liberia Liberia, PM2.5 air pollution, mean annual exposure (micrograms per cubic meter)

Year Value Rank Change Change,%
2020 42.4 27 +5.2 +14%
2019 37.2 36 -4.88 -11.6%
2018 42 32 +0.531 +1.28%
2017 41.5 35 -6.79 -14.1%
2016 48.3 27 -2.82 -5.51%
2015 51.1 29 +16.8 +48.8%
2014 34.3 42 +0.509 +1.51%
2013 33.8 48 -7.11 -17.4%
2012 41 39 -2.14 -4.97%
2011 43.1 35 +9.44 +28%
2010 33.7 46 -0.895 -2.59%
2009 34.5 46 -2.13 -5.82%
2008 36.7 41 -2.55 -6.5%
2007 39.2 37 -2.14 -5.16%
2006 41.4 33 -0.897 -2.12%
2005 42.3 34 +0.115 +0.273%
2004 42.1 33 +0.319 +0.761%
2003 41.8 35 +0.476 +1.15%
2002 41.4 39 +0.588 +1.44%
2001 40.8 39 +0.654 +1.63%
2000 40.1 41 +1.3 +3.35%
1999 38.8 42 +2.13 +5.81%
1998 36.7 44 +2.32 +6.75%
1997 34.4 48 +1.86 +5.73%
1996 32.5 51 +0.764 +2.41%
1995 31.7 54 -0.299 -0.933%
1994 32 54 -0.907 -2.75%
1993 32.9 51 -1.53 -4.44%
1992 34.5 46 -2.17 -5.92%
1991 36.6 43 -2.82 -7.16%
1990 39.5 43

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