Table:
text: 1966 Grand National
Non-finishers
Non-finishers
Fence Name_ Jockey Age Handicap_st_lb Starting_price Fate_
15 Irish Day Jimmy Magee 10 10-0 40/1 Fell
? Scottish Final J Gamble 9 10-0 100/1 Fell
? Flamecap F Carroll 9 10-0 100/1 Fell
15 Black Spot Jeremy Speid-Soote 9 10-0 100/1 Fell
? Harry Black R Court 9 10-0 100/1 Fell
? Flying Wild Pat Taaffe 10 11-0 20/1 Pulled Up
? Stirling HR Beasley 10 10-11 28/1 Pulled Up
? Vultrix Stan Mellor 8 10-7 100/7 Pulled Up
? Solimyth Mr John Lawrence 10 10-1 100/1 Pulled Up
? April Rose Major Piers Bengough 11 10-7 100/1 Pulled Up
? L`Empereur Beltrán Osorio 12 10-2 100/1 Pulled Up

text: 1966 Grand National
Non-finishers
Non-finishers
Fence Name_ Jockey Age Handicap_st_lb Starting_price Fate_
22 What A Myth Paul Kelleway 9 11-4 11/2 Fell
03 Rough Tweed Pat Buckley 12 10-7 22/1 Fell
? Kapeno David Mould 9 10-6 100/7 Fell
06 Packed Home Tommy Carberry 11 10-3 33/1 Fell
22 Greek Scholar Michael Scudamore 7 10-4 50/1 Fell
? Brown Diamond Frank Shortt 11 10-0 100/1 Fell
06 Popham Down Willie Robinson 9 10-0 22/1 Fell
? Pontin-Go TM Jones 14 10-0 100/1 Fell
15 Game Purston Paddy Cowley 8 10-0 100/1 Fell
22 Supersweet Mr D Crossley-Cooke 9 10-6 100/1 Fell
? Major Hitch Paddy Broderick 8 10-1 50/1 Fell

text: 1966 Grand National
Non-finishers
Non-finishers
Fence Name_ Jockey Age Handicap_st_lb Starting_price Fate_
14 Willow King Liam McLoughlin 11 10-0 100/1 Pulled Up
? Royal Ryse T Hyde 8 10-0 100/1 Pulled Up
? Mac`s Flare R Langley 10 10-0 100/1 Pulled Up
? King Pin Mr Tim Durant 10 10-11 100/1 Pulled Up
? In Haste J Leech 8 10-3 100/1 Pulled Up
? My Gift A Redmond 10 10-0 100/1 Pulled Up
? Bold Biri J Lehane 10 10-0 100/1 Pulled Up
22 Valouis E Prendergast 7 10-0 50/1 Brought Down
22 Leslie Mr JM Opperman 10 10-5 100/1 Brought Down
? Dorimont Mr W Shand-Kydd 12 10-0 50/1 Unseated Rider
15 Fujino-O Jeff King 7 12-0 100/1 Refused

text: 1966 Grand National
Non-finishers
Non-finishers
Fence Name_ Jockey Age Handicap_st_lb Starting_price Fate_
? Monarch`s Thought G Cramp 12 10-0 100/1 Refused
06 Groomsman Mr S Roberts 11 11-0 100/1 Refused

Question: Tell me the number of horses with a 10-0 handicap at the 1966 Grand National. ?