i don't remember the values very well, because my leveling system is modified (progress + nGDC) every skill has it's governing attribute, uping those skills will make you have the +2+3,+4,+5 bonus in attribute when you level up the trick here, if you want to have +5 in agility, for example, you have to level the skills security, sneak and marksman to make 10 (or 20, don't remember) points in the same level like, level 1 you up security 1 point, sneak 5 points, marksman 4 points = 10, you will get the +5 bonus on lvl up i hope i remembered it right....