Over a period of 20 years.I wrote much more than 150 k code lines :/How can someone even write 150K lines of proper code?
In general, the number of lines of code/programmer is 20 LOC/week.
For pacemakers, it is one LOC per 3 weeks. A typical pricing library 3-5 million LOC.
In paper-tape/punchcard era
[$]salary = \alpha LOC + \beta[$]
The big swingers were those with boxes of punch cards.