Question: Aniki-Bóbó is akin to a children's counting rhyme that has existed in various forms since well before when?

Context paragraphs:
Bickford's (restaurant): Bickford's Restaurants and Cafeterias is a chain of eateries that has existed in various forms since 1921.  From the 1920s through the 1970s the chain was a mainstay in the New York City area.  From the 1970s through the 2000s the chain was primarily located in the New England area.  As of 2016, four locations remain, all in Massachusetts, Bickford's Grille, in Brockton, Burlington, and Woburn, and Bickford's Family Restaurant, in Acton, .

Lavender's Blue: "Lavender's Blue" (sometimes called "Lavender Blue") is an English folk song and nursery rhyme dating to the 17th century.  It has a Roud Folk Song Index number of 3483.  It has been recorded in various forms since the 20th century and some pop versions have been hits in the US and UK charts.

Choir of Trinity College, Cambridge: The Choir of Trinity College, Cambridge is a mixed choir whose primary function is to sing choral services in the Tudor chapel of Trinity College, Cambridge.  The choir has taken various forms since its foundation, and has existed in its present form since 1982 when, shortly after the admission of women to the college, female voices were used for the first time for the choir’s top lines.

Catholic Church in China: Catholic Church in China (called Tiānzhǔ Jiào, 天主教, literally, "Religion of the Lord of Heaven", after the term for God traditionally used in Chinese by Catholics) has a long and complicated history.  Christianity has existed in China in various forms since at least the Tang Dynasty in the 8th century AD.  Following the 1949 takeover by the Communist Party of China, Catholic and Protestant missionaries were expelled from the country, and the religion was vilified as a manifestation of western imperialism.  In 1957, the Chinese government established the Chinese Patriotic Catholic Association, which rejects the authority of the Holy See and appoints its own bishops.

Over in the Meadow: Over in the Meadow is a popular counting rhyme of currently unknown and disputed origin.  It is likely that the rhyme originated in the United Kingdom in the 16th century.  It may instead have been written by Olive A. Wadsworth in 1870.

Aniki-Bóbó: Aniki-Bóbó is a 1942 Portuguese film directed by Manoel de Oliveira.  It is his first feature-length film.  The actors are mostly children from Oliveira's hometown, Porto.  The script was adapted by Manoel de Oliveira from a short story by José Rodrigues de Freitas, "Meninos Milionários" (lit.  "Millionaire Children").  "Aniki-Bóbó" is a rhyme from a children's game, akin to Eeny, meeny, miny, moe.

Nitty Gritty Dirt Band: The Nitty Gritty Dirt Band is an American country rock band that has existed in various forms since its founding in Long Beach, California in 1966.  The group's membership has had at least a dozen changes over the years, including a period from 1976 to 1981 when the band performed and recorded as the Dirt Band.  Constant members since the early times are singer-guitarist Jeff Hanna and drummer Jimmie Fadden.  Multi-instrumentalist John McEuen was with the band from 1966 to 1986 and returned during 2001.  Keyboardist Bob Carpenter joined the band in 1977.  The band is often cited as instrumental to the progression of contemporary country and roots music.

Dance the Night Away (Van Halen song): "Dance the Night Away" was Van Halen's first top 20 U.S. hit, peaking at #15, and the second song from their 1979 album "Van Halen II".  While the rest of the songs from this album had existed in various forms since their days doing demos and playing clubs, this song was possibly the only song written during the recording sessions for the album.  The band members conceived the song during the recording sessions while they were standing in a circle humming to each other.  It was inspired by Fleetwood Mac's "Go Your Own Way".  Eddie Van Halen purposely left a guitar solo out of the final version of the song, replacing it instead with a riff of tap harmonics.  David Lee Roth originally wanted to call the song "Dance Lolita Dance", but Eddie Van Halen convinced him that "Dance the Night Away" was more suitable and the chorus was changed to reflect that.

Eeny, meeny, miny, moe: "Eeny, meeny, miny, moe"—which can be spelled a number of ways—is a children's counting rhyme, used to select a person in games such as tag.  It is one of a large group of similar rhymes in which the child who is pointed to by the chanter on the last syllable is either "chosen" or "counted out".  The rhyme has existed in various forms since well before 1820, and is common in many languages with similar-sounding nonsense syllables.

Control Council Law No 22: Control Council Law No 22, Works Councils (10 April 1946) was a German labour law drafted in Allied-occupied Germany by the Military Government, to enable organisation of work councils in rebuilding the economy and society after World War Two.  Work councils, which employees of a firm organised and elected democratically to determine workplace issues, had existed in Germany in various forms since 1889.  They had been abolished by Adolf Hitler's Nazi party.  The new Control Council Law No 22 provided a template for democratic German trade unions to reorganise through collective agreements with employers.

Supporting paragraphs: Aniki-Bóbó Eeny, meeny, miny, moe
Answer: 1820