Table 8. Percentage of authorships, on the 1.6 million articles with 2 or more authors published between 2002-2005, by authors who (a) started, (b) ended, and (c) started as well as ended their career in during period.

Note that career start and end years were determined based on the full 2009 Author-ity dataset.

Ethnicity	First Author									Last Author
	Started			Ended			Started—Ended			Started			Ended			Started—Ended
	U	F	M	U	F	M	U	F	M	U	F	M	U	F	M	U	F	M
ENGLISH	44.1	33.1	22.9	36.7	20.6	13.9	24.5	10.9	6.4	33.2	17.4	7.2	38.4	16.8	8.7	26.5	9.3	3.6
GERMAN	50.7	33.1	18.8	50.4	19.4	10.5	34.0	9.6	4.2	38.0	13.1	4.4	48.1	13.1	5.9	31.8	6.3	1.7
HISPANIC	56.5	34.6	26.1	48.6	17.4	11.9	33.9	9.4	6.1	43.9	15.9	8.5	52.8	13.1	8.2	35.1	7.3	3.7
CHINESE	45.2	43.4	41.0	14.9	16.1	13.6	8.8	9.0	7.6	23.6	22.7	17.6	11.9	12.6	8.1	7.4	7.3	4.6
JAPANESE	25.3	31.8	19.7	18.7	23.1	13.8	9.1	10.3	5.1	9.2	15.5	5.0	13.8	16.3	7.7	6.2	7.6	2.1
SLAV	35.8	29.4	22.1	35.7	16.1	10.0	20.0	7.7	4.1	33.9	19.4	8.6	43.5	17.9	8.5	24.6	9.4	3.3
FRENCH	44.0	30.6	21.1	38.7	16.0	9.8	24.6	7.4	4.0	25.5	9.0	4.0	34.4	9.6	5.6	19.6	4.0	1.6
ITALIAN	45.6	19.3	11.8	46.2	9.9	6.0	29.6	4.1	2.2	37.9	11.0	4.3	49.5	9.4	5.5	31.4	4.3	1.6
INDIAN	41.8	41.2	35.1	23.9	19.0	13.3	15.1	10.6	7.0	20.9	20.7	12.5	20.6	14.9	8.4	11.8	8.6	3.8
NORDIC	42.9	31.8	21.1	36.0	18.6	11.4	23.2	8.0	4.4	26.3	8.8	3.9	33.1	9.8	5.6	22.0	4.3	1.7
ARAB	46.3	42.9	32.8	33.0	22.2	15.2	22.1	12.4	7.7	38.5	31.9	17.8	37.2	24.5	13.8	27.3	16.0	7.5
DUTCH	41.1	33.4	20.8	30.4	15.9	9.8	17.8	6.2	3.6	16.1	9.3	3.1	22.2	9.6	4.4	12.9	4.4	1.4
KOREAN	41.5	38.3	35.2	15.6	13.0	9.6	10.1	7.8	5.2	17.0	19.2	14.5	10.2	9.3	6.2	6.2	6.4	3.2
UNKNOWN	55.5	41.5	28.0	40.6	24.5	16.7	29.9	14.8	7.2	36.3	19.7	10.1	46.1	18.6	12.1	29.4	11.6	5.3
OTHER	38.8	32.3	22.2	25.2	14.7	8.5	16.1	7.8	3.8	28.1	19.5	9.4	28.0	13.6	7.7	17.8	7.6	3.0
OVERALL	43.0	32.6	22.9	23.6	18.0	11.9	14.8	9.1	5.2	24.9	15.8	6.8	23.0	14.3	7.5	14.5	7.6	2.8