country	gender	year	occupation	happy	sad
italy	male	2000	student	34	55
denmark	male	2000	student	45	23
italy	male	2001	researcher	33	12
denmark	male	2001	researcher	22	43
italy	female	2000	student	56	23
denmark	female	2000	student	45	32
italy	female	2001	researcher	11	33
denmark	female	2001	researcher	23	56
italy	female	2000	researcher	56	23
denmark	female	2000	researcher	45	32