Question: In what year was the Lincoln Memorial elevator installed?
About the article "Lincoln Memorial", section "Interior".

Candidate passages:
The Minato Ward 2006 elevator accident was an incident in June 2006 which shook Japanese public confidence in the safety of elevators around the country.
In June 2006, in Minato, Tokyo, a 16-year old high school student was killed by an elevator not maintained by SEC Elevator Co Ltd but of another elevator maintenance company.
He was backing out of it with his bicycle when the elevator suddenly rose with the doors still open, causing asphyxiation.
Investigations began relating to this fatality.
In the process of this investigation, elevator safety in Japan came under question, with media attention focused on Schindler Group, the Swiss based elevator manufacturer.
Of the 8,800 Schindler elevators installed in Japan, 85 have trapped people.
Following the incident, the Minato Ward public housing corporation replaced all five Schindler elevators in the condominium with elevators from another manufacturer. 
Lincoln's own memories, and independent fragmentary records, point to the family of Thomas Lincoln entering Illinois in early March, 1830, crossing over the Wabash River by primitive flatboat or ferry from their former home in Indiana.
After unloading themselves from the boat, the Lincoln family would have hitched up their oxen to the cart or wagon that carried their modest household goods, and begun to trudge northwest on the primitive trails that led to open, unclaimed farmland in central Illinois.
Walker's sculptural installation depicts the scene, with the family, animals, and oxcart depicted in bas-relief carved in Bedford stone and a tall young man, representing the young Lincoln, cast in bronze and given a prominent place on the pedestal in front of the relief.
Following their entry into Illinois, the Lincoln family trekked to what is now the Lincoln Trail Homestead State Memorial near Decatur, Illinois, where young Abraham parted ways with his family.
The Lincoln Trail State Memorial was installed in 1938 during the administration of Illinois Governor Henry Horner, an admirer of the Lincoln legacy.
A bridge had replaced the old flatboats and ferries that had previously crossed the Wabash River.
Horner hoped that the Memorial would both pay tribute to the young Lincoln and also serve as a sort of roadside welcome center to westward-bound drivers on U.S. Route 50, which was then a key east-west trunk route in the central U.S. states.
Less than thirty years after the installation, however, the federal Interstate highway system bypassed Lawrence County and its Memorial.
As of 2011, the Lincoln Trail State Memorial continues to mark a bridge entry-point into Illinois; the Memorial is an unstaffed site operated by the Illinois Historic Preservation Agency. 
Trapped in an Elevator for 41 Hours is a viral video produced by "The New Yorker" based on a real-life incident in which Nicholas White was trapped inside an elevator for a total of 41 hours.
The video features the recorded footage, from the surveillance camera installed in the elevator, which shows White's experience inside the elevator for 41 hours.
The incident took place in 1999, inside the McGraw-Hill Building in New York City. 
The first public concert was held at the Lincoln Memorial watergate on July 14, 1935.
The National Park Service paved the D.C. approaches to Arlington Memorial Bridge that same month.
It was not until September 1936 that the "Washington Post" reported that federal officials considered the Hemcycle "finished".
The structure's fountain was in place, and the Hemicycle was now lit at night.
Lighting had also been installed along Memorial Drive, and holly trees and additional oaks had been planted along road.
In 1938, Arlington Memorial Bridge was finally connected to the Arlington County road network.
By that year, more than 18,000 vehicles a day used the bridge to access the George Washington Memorial Parkway (formerly the Mount Vernon Memorial Parkway).
On October 18, Virginia finally opened its first connection to the bridge, via Lee Boulevard (now Arlington Boulevard) at the north end of Columbia Island. 
 safety.
Cable-borne elevators.
Statistically speaking, cable-borne elevators are extremely safe.
Their safety record is unsurpassed by any other vehicle system.
In 1998, it was estimated that approximately eight millionths of one percent (1 in 12 million) of elevator rides result in an anomaly, and the vast majority of these were minor things such as the doors failing to open.
Of the 20 to 30 elevator-related deaths each year, most of them are maintenance-related — for example, technicians leaning too far into the shaft or getting caught between moving parts, and most of the rest are attributed to other kinds of accidents, such as people stepping blindly through doors that open into empty shafts or being strangled by scarves caught in the doors.
In fact, prior to the September 11th terrorist attacks, the only known free-fall incident in a modern cable-borne elevator happened in 1945 when a B-25 bomber struck the Empire State Building in fog, severing the cables of an elevator cab, which fell from the 75th floor all the way to the bottom of the building, seriously injuring (though not killing) the sole occupant — the elevator operator.
However, there was an incident in 2007 at a Seattle children's hospital, where a ThyssenKrupp ISIS machine-room-less elevator free-fell until the safety brakes were engaged.
This was due to a flaw in the design where the cables were connected at one common point, and the kevlar ropes had a tendency to overheat and cause slipping (or, in this case, a free-fall).
While it is possible (though extraordinarily unlikely) for an elevator's cable to snap, all elevators in the modern era have been fitted with several safety devices which prevent the elevator from simply free-falling and crashing.
An elevator cab is typically borne by six or eight hoist cables, each of which is capable on its own of supporting the full load of the elevator plus twenty-five percent more weight.
In addition, there is a device which detects whether the elevator is descending faster than its maximum designed speed; if this happens, the device causes copper brake shoes to clamp down along the vertical rails in the shaft, stopping the elevator quickly, but not so abruptly as to cause injury.
This device is called the governor, and was invented by Elisha Graves Otis.
In addition, a hydraulic buffer is installed at the bottom of the shaft to somewhat cushion any impact.
However, In Thailand, in November 2012, a woman was killed in free falling elevator, in what was reported as the "first legally recognised death caused by a falling lift".