| Value | Label | N | WN |
|---|---|---|---|
| -9 | 모르겠음 | 150 | 0 |
| -8 | 응답거부 | 61 | 0 |
| - | 1900 | 3 | 0 |
| - | 1901 | 1 | 0 |
| - | 1902 | 4 | 0 |
| - | 1904 | 1 | 0 |
| - | 1905 | 1 | 0 |
| - | 1907 | 5 | 0 |
| - | 1908 | 10 | 0 |
| - | 1909 | 6 | 0 |
| - | 1910 | 14 | 0 |
| - | 1911 | 5 | 0 |
| - | 1912 | 17 | 0 |
| - | 1913 | 21 | 0 |
| - | 1914 | 19 | 0 |
| - | 1915 | 19 | 0 |
| - | 1916 | 29 | 0 |
| - | 1917 | 36 | 0 |
| - | 1918 | 29 | 0 |
| - | 1919 | 49 | 0 |
| - | 1920 | 63 | 0 |
| - | 1921 | 37 | 0 |
| - | 1922 | 60 | 0 |
| - | 1923 | 55 | 0 |
| - | 1924 | 53 | 0 |
| - | 1925 | 65 | 0 |
| - | 1926 | 58 | 0 |
| - | 1927 | 54 | 0 |
| - | 1928 | 66 | 0 |
| - | 1929 | 58 | 0 |
| - | 1930 | 77 | 0 |
| - | 1931 | 49 | 0 |
| - | 1932 | 65 | 0 |
| - | 1933 | 68 | 0 |
| - | 1934 | 54 | 0 |
| - | 1935 | 65 | 0 |
| - | 1936 | 60 | 0 |
| - | 1937 | 53 | 0 |
| - | 1938 | 51 | 0 |
| - | 1939 | 36 | 0 |
| - | 1940 | 55 | 0 |
| - | 1941 | 41 | 0 |
| - | 1942 | 31 | 0 |
| - | 1943 | 39 | 0 |
| - | 1944 | 30 | 0 |
| - | 1945 | 32 | 0 |
| - | 1946 | 20 | 0 |
| - | 1947 | 25 | 0 |
| - | 1948 | 28 | 0 |
| - | 1949 | 19 | 0 |
| - | 1950 | 36 | 0 |
| - | 1951 | 15 | 0 |
| - | 1952 | 24 | 0 |
| - | 1953 | 20 | 0 |
| - | 1954 | 16 | 0 |
| - | 1955 | 24 | 0 |
| - | 1956 | 15 | 0 |
| - | 1957 | 15 | 0 |
| - | 1958 | 12 | 0 |
| - | 1959 | 7 | 0 |
| - | 1960 | 10 | 0 |
| - | 1961 | 9 | 0 |
| - | 1962 | 82 | 0 |
| - | 1963 | 82 | 0 |
| - | 1964 | 69 | 0 |
| - | 1965 | 48 | 0 |
| - | 1966 | 35 | 0 |
| - | 1967 | 21 | 0 |
| - | 1968 | 8 | 0 |
| - | 1969 | 8 | 0 |
| - | 1970 | 4 | 0 |
| - | 1971 | 3 | 0 |
| - | 1972 | 2 | 0 |
| - | 1973 | 3 | 0 |
| - | 1975 | 1 | 0 |
| - | 1977 | 1 | 0 |
| - | 1981 | 1 | 0 |
| - | Sysmiss | 7,736 | 0 |
This variable is numeric