Fetching stats via StatGetInt always returns 0

FiveM Resource Development & Modding Discussion
,
1

I am trying to get some basic statistics from the game such as civilians killed, cops killed, etc. Every stat I try to fetch is returning 0.

function killStats()
    ret, inn = StatGetInt(GetHashKey("KILLS_INNOCENTS"), -1)
    ret, cop = StatGetInt(GetHashKey("KILLS_COP"), -1)
    ret, swat = StatGetInt(GetHashKey("KILLS_SWAT"), -1)
    ret, gang1 = StatGetInt(GetHashKey("KILLS_ENEMY_GANG_MEMBERS"), -1)
    ret, gang2 = StatGetInt(GetHashKey("KILLS_FRIENDLY_GANG_MEMBERS"), -1)
    ret, car = StatGetFloat(GetHashKey("DIST_CAR"), -1)

    print('Innocents: '..inn)
    print('Cops: '..cop)
    print('Swat: '..swat)
    print('Enemy Gang: '..gang1)
    print('Friendly Gang: '..gang2)
    print('car dist:  '..car)
end

Am I missing something here? Is this the correct usage?
I want to create some mini-games and these numbers are crucial before I can move on.

Thanks