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By the numbers: Data & statistics on Wallenda's historic walk

7: The number of generations of “Great Wallendas,” known for their high-profile daredevil stunts

33: Age of Nik Wallenda

45: Estimated number of minutes it will take Wallenda to walk over Niagara Falls

5: Diameter in centimetres of Wallenda’s tightrope

60: Height in metres of Wallenda’s tightrope above the gorge bottom

550:  Approximate length in metres of the tightrope crossing the Niagara gorge

46: The length in metres of Wallenda’s Guinness world record stunt in 2008 – the longest distance and greatest height ever traveled by bicycle on a high wire. He walked out from the roof of Newark, N.J.’s Prudential building and rode back on a bike

6: Number of Guinness world records held by Wallenda

1859:
The first time someone crossed Niagara Falls on a tightrope (Jean Francois Gravelet, “The Great Blondin”)

1896: The last time someone crossed Niagara Falls on a tightrope (James Hardy)

1978:
The year Karl Wallenda, Nik’s grandfather, fell to his death walking a tightrope between two buildings in Puerto Rico. The fall was blamed on “bad rigging”

120,000:
Number of people expected to attend Friday night’s stunt in Niagara Falls.

$50,000:
Wallenda’s target donation amount on website indiegogo.com for “training, rigging, marketing, travel, safety and unforeseen issues”

$21,076:
Amount raised so far on indiegogo.com (as of Friday morning)

$20.5 million:
Amount expected to be spent in Niagara Falls by “non-locals” during the walk day, according to an economic impact report by Enigma Research

$122 million:
Amount of “legacy” economic impact over the next five years, according to Enigma

$1.3 million:
The amount Wallenda estimates the stunt will cost him (including the fabrication and installation of the custom-made steel wire, permits and security on both sides of the border as well as travel and marketing). He’s recouping some of those costs with a broadcast deal with U.S. network ABC

Sources: indiegogo.com; niagaraparks.com; nikwallenda.com; Enigma Research report