Show ip cef switching statistic output - some clarifications required

Good morning, everyone!
I need some clarifications regarding ouput of show ip cef switching statistic on Catalyst 6k and some entries apply to other platforms as well. Consider output:
#show ip cef switching statistics
       Reason                          Drop       Punt Punt2Host
RP LES No route                      179269          0      12866
RP LES Packet destined for us             0 153061543          2
RP LES No adjacency                12460594          0          0
RP LES Incomplete adjacency           10400          0          0
RP LES Unresolved route                1476          0          0
RP LES Bad checksum                      17          0          0
RP LES TTL expired                        0          0   24725338
RP LES IP options set                     0          0          3
RP LES Fragmentation failed, DF 1757274333          0     481160
RP LES Features                         975          0       5278
RP LES IP redirects                       0          0          7
RP LES Unknown input if                 192          0          0
RP LES Neighbor resolution req     32540982       7290          0
RP LES Total                     1802468238 153068833   25224654
All    Total                     1802468238 153068833   25224654
Questions are:
1) What the difference between rows
RP LES No adjacency
RP LES Incomplete adjacency
RP LES Neighbor resolution req
2) What the difference between rows
RP LES No route
RP LES Unresolved route
3) What does mean collum name - Punt2Host?
I will higly aprecciate your answers! Thnx in advance.

So far I partially have found answer on first question.
RP LES Neighbor resolution req - here counted packets that have no adjacency and they are punted to arp request to send.
RP LES No adjacency - after ARP request sent throttling adjacency is installed for this destination for 2 seconds and all subsequent packets get drop. Those packets are counted here.
RP LES Incomplete adjacency - here packets counted which matches to incomplete adjacencies. Which are stays in adjacency table marked incomplete - as i understand it can happen after arp entry aged out. But those adjacencies must be deleted as well, but as i can see in my environment some of them stays for a while, i am a bit confused here.

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