Is there a more efficient way of doing this?

This script looks, and probably is, very inefficient. And it doesn't want to work. Any help?

game.Players.PlayerAdded:connect(function(plr)
    local rank = Instance.new("StringValue", plr)
        rank.Name = "Rank"
    local stats = plr:WaitForChild("leaderstats")
    local rep = stats:WaitForChild("Reputation")

    --POSITIVE

    if rep then
        print("Found "..plr.Name.."'s reputation.")
    end

    if rep.Value <= 99 then
        rank.Value = "Civilian"
    end

    if rep.Value >= 100 and rep.Value < 999 then
        rank.Value = "Constable"
    end

    if rep.Value >= 1000 and rep.Value < 2499 then
        rank.Value = "Vigilante"
    end

    if rep.Value >= 2500 and rep.Value < 4999 then
        rank.Value = "Deputy"
    end

    if rep.Value >= 5000 and rep.Value < 9999 then
        rank.Value = "Lawman"
    end

    if rep.Value >= 10000 and rep.Value < 14999 then
        rank.Value = "Guardian"
    end

    if rep.Value >= 15000 and rep.Value < 24999 then
        rank.Value = "Nobile"
    end

    if rep.Value >= 25000 and rep.Value < 99999 then
        rank.Value = "Hero"
    end

    if rep.Value >= 100000 and rep.Value < 249999 then
        rank.Value = "Omeaga Hero"
    end

    if rep.Value >= 250000 then
        rank.Value = "Saint of Sanctuary"
    end

    --NEGATIVE// WILL DO THE SAME TO THIS//

--  if rep.Value <= -1 then
--      rank.Value = "Civilian"
--  end
--  
--  if rep.Value <= -5 then
--      rank.Value = "Felon"
--  end 
--  
--  if rep.Value <= -100 then
--      rank.Value = "Thug"
--  end
--  
--  if rep.Value <= -1000 then
--      rank.Value = "Outlaw"
--  end
--  
--  if rep.Value <= -2500 then
--      rank.Value = "Bandit"
--  end
--  
--  if rep.Value <= -5000 then
--      rank.Value = "Marauder"
--  end
--  
--  if rep.Value <= -10000 then
--      rank.Value = "Villian"
--  end
--  
--  if rep.Value <= -15000 then
--      rank.Value = "Hitman"
--  end
--  
--  if rep.Value <= -25000 then
--      rank.Value = "Assassin"
--  end
--  
--  if rep.Value <= -100000 then
--      rank.Value = "Serial Killer"
--  end
--  
--  if rep.Value <= -250000 then
--      rank.Value = "Destroyer of Worlds"
--  end

end)