Year

Coal Quality

Coal Management

Coal Manager

Coal Administration

2010

58

1

2011

85

2

2012

98

2

1

2013

115

1

3

2014

129

1

2015

118

2

1

2016

147

3

2017

155

4

2018

162

6

2019

181

2

1

2020

195

2

2021

207

8

1

2022

144

5

1

TOTAL

1794

36

5

6