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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 | * | |||||||||||||
2022 | 0.005 | 0.005 | * | 0.005 | 0.005 | 0.000 | 16 | 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 | 0.005 | 0.000 | 30 | 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 | 29 | 0.01 | |||||||||||||
2016 | 0.005 | 0.005 | 0.009 | 0.01 | 0.09 | 0.017 | 31 | 0.01 | |||||||||||||
2015 | 0.005 | 0.005 | 0.005 | 0.005 | 0.005 | 0.000 | 28 | 0.01 | |||||||||||||
2014 | 0.005 | 0.005 | * | 0.005 | 0.005 | 0.000 | 25 | 0.01 | |||||||||||||
2013 | 0.005 | 0.005 | * | 0.005 | 0.01 | 0.002 | 26 | 0.01 | |||||||||||||
2012 | 0.005 | 0.005 | * | 0.005 | 0.005 | 0.000 | 20 | 0.01 | |||||||||||||
2011 | 0.005 | 0.005 | 0.007 | 0.01 | 0.01 | 0.003 | 31 | 0.01 | |||||||||||||
2010 | 0.005 | 0.01 | 0.010 | 0.01 | 0.02 | 0.004 | 30 | 0.01 | |||||||||||||
2009 | 0.005 | 0.01 | 0.011 | 0.01 | 0.02 | 0.003 | 31 | 0.01 | |||||||||||||
2008 | 0.01 | 0.01 | 0.012 | 0.02 | 0.02 | 0.004 | 32 | 0.01 | |||||||||||||
2007 | 0.01 | 0.02 | 0.016 | 0.02 | 0.02 | 0.005 | 31 | 0.01 | |||||||||||||
2006 | 0.01 | 0.02 | 0.020 | 0.02 | 0.03 | 0.003 | 31 | 0.01 | |||||||||||||
2005 | 0.02 | 0.02 | 0.022 | 0.02 | 0.04 | 0.004 | 30 | 0.01 | |||||||||||||
2004 | 0.02 | 0.03 | 0.029 | 0.03 | 0.04 | 0.006 | 30 | 0.01 | |||||||||||||
2003 | 0.03 | 0.04 | 0.080 | 0.17 | 0.78 | 0.144 | 31 | 0.01 | |||||||||||||
2002 | 0.04 | 0.05 | 0.050 | 0.06 | 0.07 | 0.008 | 27 | 0.01 | |||||||||||||
2001 | 0.04 | 0.05 | 0.056 | 0.06 | 0.13 | 0.017 | 27 | 0.01 | |||||||||||||
2000 | 0.05 | 0.10 | 0.748 | 0.20 | 15 | 2.76 | 29 | 0.01 | |||||||||||||
1999 | 0.07 | * | * | * | 0.16 | 0.031 | 9 | 0.01 | |||||||||||||
1998 | 0.04 | 0.09 | * | 0.12 | 0.16 | 0.032 | 16 | 0.01 | |||||||||||||
1997 | 0.05 | 0.10 | 0.128 | 0.23 | 0.36 | 0.069 | 29 | 0.01 | |||||||||||||
1996 | 0.06 | 0.19 | 0.198 | 0.32 | 0.36 | 0.074 | 30 | 0.01 | |||||||||||||
1995 | 0.11 | 0.32 | 0.607 | 0.65 | 3.0 | 0.758 | 31 | 0.01 | |||||||||||||
1994 | 0.11 | 0.44 | 0.614 | 1.04 | 4.4 | 0.812 | 29 | 0.01 | |||||||||||||
1993 | 0.15 | 0.42 | 0.475 | 0.81 | 0.92 | 0.227 | 27 | 0.01 | |||||||||||||
1992 | 0.17 | 0.77 | 1.10 | 1.64 | 5.9 | 1.06 | 29 | 0.01 | |||||||||||||
1991 | 0.38 | 1.45 | 1.98 | 3.41 | 9.0 | 1.75 | 28 | 0.01 | |||||||||||||
1990 | 0.22 | 1.2 | 1.63 | 3.86 | 4.4 | 1.28 | 28 | 0.01 | |||||||||||||
1989 | 0.13 | 1.2 | * | 5.14 | 11 | 2.83 | 19 | 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. |