Month-to-date consolidated LF is 73.4%. Let's compare to historical numbers:

Consolidated Jan LF:
2008: 76.8%
2007: 76.3%
2006: 75.9%
2005: 75.4%

Mainline/Regional Jan LF:
2004: 71.4%/61.3%
2003: 67.9%/56.4%
2002: 70.1%/54.3%
2001: 67.1%/51.9%
2000: 67.9%/54.8%
1999: 68.0%/54.8%
1998: 64.8%/47.5%
1997: 64.5%/43.0%

So, I guess LF is just "returning to historical norm".