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Year | Months Present |
Minimum | Median | Mean | 90th Percentile |
Maximum | Standard Deviation |
Number of Observations |
Detection Limit |
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2023 | 0.005 | 0.005 | * | 0.005 | 0.005 | 0.000 | 21 | 0.01 | |||||||||||||
2022 | 0.005 | 0.005 | 0.005 | 0.005 | 0.005 | 0.000 | 30 | 0.01 | |||||||||||||
2021 | 0.005 | 0.005 | * | 0.005 | 0.005 | 0.000 | 23 | 0.01 | |||||||||||||
2020 | 0.005 | * | * | * | 0.005 | 0.000 | 9 | 0.01 | |||||||||||||
2019 | 0.005 | 0.005 | 0.005 | 0.005 | 0.02 | 0.003 | 29 | 0.01 | |||||||||||||
2018 | 0.005 | 0.005 | 0.005 | 0.005 | 0.005 | 0.000 | 31 | 0.01 | |||||||||||||
2017 | 0.005 | 0.005 | 0.005 | 0.005 | 0.005 | 0.000 | 28 | 0.01 | |||||||||||||
2016 | 0.005 | 0.005 | 0.009 | 0.005 | 0.06 | 0.012 | 30 | 0.01 | |||||||||||||
2015 | 0.005 | 0.005 | 0.011 | 0.03 | 0.05 | 0.012 | 31 | 0.01 | |||||||||||||
2014 | 0.005 | 0.005 | * | 0.005 | 0.04 | 0.007 | 27 | 0.01 | |||||||||||||
2013 | 0.005 | 0.005 | 0.005 | 0.005 | 0.005 | 0.000 | 30 | 0.01 | |||||||||||||
2012 | 0.005 | 0.005 | 0.006 | 0.005 | 0.01 | 0.002 | 30 | 0.01 | |||||||||||||
2011 | 0.005 | 0.005 | 0.007 | 0.01 | 0.02 | 0.004 | 31 | 0.01 | |||||||||||||
2010 | 0.005 | 0.005 | 0.008 | 0.01 | 0.02 | 0.004 | 30 | 0.01 | |||||||||||||
2009 | 0.005 | 0.01 | 0.010 | 0.01 | 0.02 | 0.003 | 32 | 0.01 | |||||||||||||
2008 | 0.01 | 0.01 | 0.011 | 0.01 | 0.02 | 0.003 | 30 | 0.01 | |||||||||||||
2007 | 0.01 | 0.01 | 0.014 | 0.02 | 0.02 | 0.005 | 31 | 0.01 | |||||||||||||
2006 | 0.01 | 0.02 | * | 0.02 | 0.02 | 0.002 | 26 | 0.01 | |||||||||||||
2005 | 0.02 | 0.02 | 0.021 | 0.02 | 0.03 | 0.003 | 29 | 0.01 | |||||||||||||
2004 | 0.005 | 0.03 | 0.025 | 0.03 | 0.03 | 0.006 | 31 | 0.01 | |||||||||||||
2003 | 0.03 | 0.03 | * | 0.04 | 0.04 | 0.005 | 28 | 0.01 | |||||||||||||
2002 | 0.03 | 0.04 | 0.043 | 0.05 | 0.07 | 0.008 | 31 | 0.01 | |||||||||||||
2001 | 0.04 | 0.05 | 0.048 | 0.05 | 0.08 | 0.008 | 30 | 0.01 | |||||||||||||
2000 | 0.04 | 0.06 | 0.073 | 0.12 | 0.14 | 0.028 | 28 | 0.01 | |||||||||||||
1999 | 0.05 | 0.08 | * | 0.12 | 0.16 | 0.029 | 11 | 0.01 | |||||||||||||
1998 | 0.03 | 0.06 | * | 0.11 | 0.24 | 0.044 | 24 | 0.01 | |||||||||||||
1997 | 0.06 | 0.09 | 0.164 | 0.24 | 1.2 | 0.211 | 29 | 0.01 | |||||||||||||
1996 | 0.07 | 0.16 | * | 0.33 | 4.5 | 0.854 | 26 | 0.01 | |||||||||||||
1995 | 0.16 | 0.35 | 0.430 | 0.71 | 1.2 | 0.254 | 29 | 0.01 | |||||||||||||
1994 | 0.09 | 0.46 | 0.513 | 1.0 | 1.3 | 0.335 | 31 | 0.01 | |||||||||||||
1993 | 0.23 | 0.49 | 1.08 | 1.2 | 9.4 | 1.98 | 31 | 0.01 | |||||||||||||
1992 | 0.34 | 0.97 | 1.66 | 2.16 | 20 | 3.51 | 30 | 0.01 | |||||||||||||
1991 | 0.57 | 1.2 | 1.78 | 3.14 | 7.0 | 1.53 | 30 | 0.01 | |||||||||||||
1990 | 0.46 | 1.3 | 1.38 | 1.9 | 2.8 | 0.547 | 31 | 0.01 | |||||||||||||
1989 | 0.28 | 1.2 | 1.27 | 1.97 | 3.0 | 0.667 | 24 | 0.01 | |||||||||||||
Notes: | Values below the Limit of Detection (LoD) assumed to be ½ LoD. Means and risks shown only for years with data in all 12 months. "*" means there was insufficient or no data available to determine the value. |