id; year; methode
1;  2015; 2
2;  2015; 2
3;  2015; 2
12; 2013; 4
4;  2014; 7
1;  2014; 7
3;  2014; 7

id : {counts_of_diffrent_years : sum, years : [hit1,hit2], counts_of_diffrent_methods : 2, methods : [hit1,hit2]}

{3 : {counts_of_diffrent_years : 2, years : [2014,2015], counts_of_diffrent_methods : 2, methods : [2,7]},...}