Year
|
Ammonium 1992-2020 (679)
|
Ammonium 2000-2020 (1,047)
|
1992
|
497.49
|
|
1993
|
516.67
|
|
1994
|
440.19
|
|
1995
|
439.16
|
|
1996
|
500.39
|
|
1997
|
407.09
|
|
1998
|
332.56
|
|
1999
|
288.56
|
|
2000
|
263.79
|
366.71
|
2001
|
258.01
|
359.69
|
2002
|
272.67
|
377.18
|
2003
|
260.57
|
359.63
|
2004
|
220.77
|
304.63
|
2005
|
244.8
|
301.37
|
2006
|
223.93
|
281.63
|
2007
|
214.08
|
284.46
|
2008
|
163.87
|
247.37
|
2009
|
151.23
|
227.2
|
2010
|
134.69
|
194.76
|
2011
|
130.98
|
192.16
|
2012
|
122.9
|
202.42
|
2013
|
104.37
|
163.03
|
2014
|
95.37
|
140.14
|
2015
|
88.65
|
139.37
|
2016
|
88.71
|
139.83
|
2017
|
111.69
|
143.69
|
2018
|
107.03
|
134.73
|
2019
|
105.97
|
137.39
|
2020
|
114.61
|
153.53
|