grade_1
1(2000.10`2002.3)
grade_2
2(2001.10`2003.3)
grade_3
3(2002.10`2004.3)
grade_4
4(2003.10`2005.3)
grade_5
5(2004.10`2006.3)
grade_6
6(2005.10`2007.3)
grade_7
7(2006.10`2008.3)
grade_8
8(2007.10`2009.3)
grade_9
9(2008.10`2010.3)
grade_10
10(2009.10`2011.3)
grade_11
11(2010.10`2012.3)
grade_12
12(2011.10`2013.3)
grade_13
13(2012.10`2014.3)
grade_14
14(2013.10`2015.3)
grade_14
15(2014.4`2016.3)
grade_15
16(2015.4`2017.3)
grade_15
17(2016.4`2018.3)

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