美国有多少制药企业???

美国前十大制药企业（按照股票总市值）
Roche Holding Ltd. (ADR) RHHBY 30.40* +0.48 (1.60%) 209.78B
627,331.00 30.29 30.74 30.1199
Johnson & Johnson JNJ 50.92 -0.48 (-0.93%) 140.93B
14.77M 51.76 51.84 50.64
Pfizer Inc. PFE 13.17 -0.11 (-0.83%) 88.83B 65.62M
13.31 13.38 12.99
Novartis AG (ADR) NVS 36.85 +0.07 (0.19%) 83.46B 2.
32M 37.19 37.3 36.75
GlaxoSmithKline plc (ADR) GSK 29.34 +0.23 (0.79%) 76.11B
2.33M 29.44 29.62 29.1
Abbott Laboratories ABT 43.09 -0.27 (-0.62%) 66.59B
9.31M 43.57 43.9 42.88
Wyeth WYE 42.10 -0.41 (-0.96%) 56.05B 17.54M 42.
42 42.6 41.99
Amgen, Inc. AMGN 49.83 +3.01 (6.43%) 50.89B 16.12M
48.11 50.02 47.69
Merck & Co., Inc. MRK 23.45 +0.22 (0.95%) 49.43B 22. 07M 23.27 23.55 23.05 Gilead Sciences, Inc. GILD 45.80 -0.10 (-0.22%) 41.68B 6.30M 46.03 46.12 45.42

好多个

哪里能够查到个具体数字