我想将以下其转换成数据格式,提示错误。请问前辈们怎么处理?
Example generated by -dataex-. To install: ssc install dataex
clear
input str4 founding_year
"1994"
"1939"
"1987"
"1900"
"1989"
"1992"
"1992"
"1993"
"1956"
"1988"
"1986"
"1996"
"1990"
"1982"
"1985"
"1965"
"1979"
"1989"
"1984"
"1997"
"1986"
"1992"
"1997"
"1994"
"1964"
"1992"
"1988"
"1994"
"1993"
"1996"
"1993"
"1994"
"1991"
"1993"
"1997"
"1974"
"1966"
"1954"
"1959"
"1996"
"1984"
"1976"
"1986"
"1950"
"1996"
"1958"
"1975"
"1998"
"1955"
"1995"
"1997"
"1974"
"1987"
"1998"
"1994"
"1994"
"1984"
"1987"
"1985"
"1981"
"1986"
"1982"
"1988"
"1993"
"1974"
"1997"
"1992"
"1994"
"1979"
"1976"
"1997"
"1964"
"1996"
"1975"
"1958"
"1954"
"1979"
"1985"
"1989"
"1972"
"1980"
"1997"
"1986"
"1995"
"1968"
"1959"
"1960"
"1958"
"1998"
"1964"
"1993"
"1994"
"1998"
"1956"
"1994"
"1997"
"1956"
"1979"
"1959"
"1951"
end
dataex



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